`Docket No.: 123193-8242-US
`
`CAPACITOR COMPONENT
`
`CROSS-REFERENCE TO RELATED APPLICATION (S)
`
`
`[0001] This application is the continuation application of U.S.
`
`
`
`Patent Application No. 16/293,286 filed on March 5, 2019, which
`
`
`
`claims benefit
`of priority to Korean Patent Application
`
`
`No. 10-2018-0151034 filed on November 29,
`
`
`
`
`
` Intellectual Property Office,
`
`the disclosures of which are
`
`2018 in the Korean
`
`
`
`
`
`
`
`
`incorporated herein by reference in their entirety.
`
`10
`
`1. FIELD
`
`BACKGROUND
`
`[0002] The present disclosure relates to a capacitor component.
`
`2. DESCRIPTION OF RELATED ART
`
`15
`
`[0003] A multilayer ceramic capacitor
`
`(MLCC)
`
`is a chip-type
`
`
`condenser commonly mounted on printed circuit boards of a variety
`
` of electronic products such as an image display devices, including
`
`liguid crystal displays (LCD)
`
`and plasma display panels
`
`
`(PDP),
`
`computers, smartphones, cellular phones, and the like, serving to
`
`20
`
`charge and discharge electricity.
`
`[0004] Sucha multilayer ceramic capacitor (MLCC) may also be used
`
`
`as a component of various electronic devices, due to advantages
`
`
`thereof such as compactness, guaranteed high capacitance, and ease
`
`
`
` of mountability. With the trend for miniaturization and high
`
`Page l
`
`
`
`
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`output of various electronic devices such as a computer and a mobile
`
`the increasing need_forlike, there is an
`and
`device,
`
`
`
`
`
`
`
`
`
`
`
`
`
`miniaturization and high capacitance in a multilayer ceramic
`
`Capacitor.
`
`[00
`
`05]
`
`
`In addition,
`
`as
`
`an industrial
`
`interest
`
`in electrical
`
`components is increasing recently, research into multilayer ceramic
`
`Capacitors
`
`( MLCCs) has been conducted to optimize MLCCs
`
`for
`
`
`
`automobiles or infotainment systems. As compared to MLCCs for
`
`in formation
`
`
`
`technology
`
`
`(IT)
`
`devices, MLCCs
`
`
`for electrical
`
`10
`
`components may be used in relatively harsh environments having a
`
`high risk o1
`
`
`F human injury. Accordingly, there is a need for MLCCs
`
`having high-reliability and high-strength characteristics.
`
`SUMMARY
`
`
`
`15
`
`[00
`
`06] Anaspect of the present disclosure is to provide a capacitor
`
`component having high-strength characteristics.
`
`[00
`
`
`07] According to an aspect of
`
`the present disclosure,
`
`a
`
`Capacitor co
`
`mponent
`
`die
`
`lectric layers
`
`
`
`
`includes a body including a plurality of
`
`and first
`
`and second internal electrodes,
`
`
`
`20
`
`
`alternately disposed to face each other with respective dielectric
`
`layers interposed therebetween,
`
`
`the body having first and second
`
`sur faces, dis
`
`
`posed to oppose eachother, third and fourthsurfaces,
`
`
`
`connected to
`the first and second surfaces and disposed to oppose
`
`
`
`
`
`
`fifth and sixth surfaces connected to the first
`
`
`
`h other, and
`
`eac
`
`25
`
`to
`
`
`
`
`fourth surifaces and disposed to oppose each other.
`
`The capacitor
`
`Page 2
`
`
`
`
`
`
`component further includes first and second external electrodes
`
`
`Docket No.: 123193-8242-US
`
`
`
`disposed on external surfaces of the body and connected to the first
`
`
`
`and second internal electrodes, respectively.
`
`The body includes
`
`
`a capacitance forming portion,
`
`
`in which capacitance is formed by
`
`
`
`includingthe first and second internal electrodes disposed to face
`
`each
`
`other with
`
`respective dielectric
`
`layers
`
`interposed
`
`therebetween,
`
`and below the
`
`
`
`
`capacitance forming portion in a stacking direction of the first
`
`cover portions disposed above
`
`and second internal electrodes, and margin portions disposed on
`
`
`
`10
`
`
`
`opposite sides of the capacitance forming portion. At least one
`
`selected from the cover portions and the margin portions includes
`
`
`a plurality of graphene platelets.
`
`
`
`
`
`[0008] The capacitance forming portion may not include graphene.
`
`
`
`
`
`
`
`
`
`[0009] The capacitance forming portion may have a lower graphene
`
`15
`
`
`content than the at least one selected from the cover portions and
`
`the margin portions.
`
`
`[0010] The at least one selected from the cover portion and the
`
`
`margin portions may include a plurality of dielectric grains and
`
`grain boundaries disposed between adjacent dielectric grains, and
`
`20
`
`
`the plurality of graphene platelets may be disposed in the grain
`
`boundaries.
`
`
`[0011] The graphene platelets may have one surface disposed along
`
`
`
`
`surfaces of the plurality of dielectric grains.
`
`Page 3
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`[0012] Among the plurality ot!
`
`f graphene platelets, 5 percent or less
`
`
`of the total graphene platelets may be in a laminated state with
`
`
`10 or more laminated layers of graphene.
`
`[0013] The
`
`
`content of the plu
`
`
`rality of graphene platelets in the
`
`at least one
`
`
`selected fromthec
`
`over portions and the margin portions
`
`may be 0.05 weight percentage or more to less than 2.0 weight
`
`
`percentage, compared with bariumtitanate (BaTi03) contained in the
`
`at
`
`least one selected
`
` from the cover portions and the margin
`
`portions.
`
`10
`
`
`[0014] The at least one selected from the cover portions and the
`
`margin portions may have peaks in a Raman analysis detected in each
`
`
`
`of a D-band
`
`and a G-band.
`
`[0015] The
`
`
`Capacitance forming portion may have a peak in a Raman
`
`
`
`analysis which is detected in only one from among a D-band and a
`
`15
`
`G-band.
`
`[0016]
`
`
`Some of the plurality o!
`
` f graphene platelets may be a graphene
`
`oxide or a reduced graphene oxide.
`
`
`
`
`[0017] Each of the first and
`
`second internal electrodes may have
`
`a thickness
`
`20
`
`may have a
`
`
`less than 1 micrometer, and each of the dielectric layers
`
`thickness less than 2.8 micrometers.
`
`
`
`
` defined as td,
`
`
`
`[0018] When
`
`
`a thickness of each of the internal electrodes is
`
`defined as te and a thickness
`
`te and td satisfy td > 2*te.
`
`
`of each of the dielectric layers is
`
`
`
`Page 4
`
`
`
`
`Docket No.: 123193-8242-US
`
`[0019]
`
`
`
`
`
`Each of the first and second external electrodes may include
`
`an electrode layer and a conductive resin layer disposed on the
`
`
`
`electrode layer.
`
`[0020] The electrode layer may include a glass and a conductive
`
`metal
`
`
`including at least one selected from the group consisting
`
`(Ni), and alloys thereof.
`
` of copper
`
`(Cu), Silver
`
`(Ag), nickel
`
`[0021]
`
`The conductive resin layer may include a base resin anda
`
`conduct
`
`tive metal
`
`
`including at least one selected from the group
`
`consist
`
`
`ting of copper
`
`(Cu), silver (Ag), nickel
`
`(Ni), and alloys
`
`
`
`10
`
`thereof.
`
`[0022]
`
`The
`
` first external electrode may be disposed on the third
`
`
`
`surface and includes a band portion extending onto portions of the
`
`
`
`
`
`first and second surfaces. A distance from the third surface to
`
`an end
`
`
`
`of the band portion of the electrode layer may be shorter
`
`15
`
`
`
`
`than a distance from the third surface to an end of the band portion
`
` of the conductive resin layer.
`
`[0023]
`
`
`According to an aspect of
`
`the present disclosure,
`
`a
`
`capaci
`
`tor component
`
`includes a body including a plurality of
`
` tric
`
`
`
`dielect
`
`layers
`
`and first
`
`and second internal electrodes,
`
`
`alternately disposed to face each other with respective dielectric
`
`layers interposed therebetween,
`
`
`the body having first and second
`
`20
`
`25
`
`
`
`
`surfaces, disposed to oppose each other, third and fourth surfaces,
`
`
`
`ted to the first and second surfaces and disposed to oppose
`
`
`
`
`
`fifth and sixth surfaces connected to the first
`
`connec
`
` ther,
`
`each ot
`
`and
`
`
`
`to fourth surfaces and disposed to oppose each other, and first
`
`Page 5
`
`
`
`
`
`
`
` portion. At least one selected
`
`
`
`
`the capacitance forming
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`
`and second external electrodes disposed on external surfaces of
`
`
`the body and connected to the first and second internal electrodes,
`
`
`
`respectively.
`
`The body includes a capacitance forming portion,
`
`in
`
`
`which capacitance is formed by
`
`
`including the first and second
`
` face each other with respective
`internal electrodes disposed to
`
`dielectric layers interposed ther
`between, cover portions disposed
`
`
`
`above and below the capacitance
`
` forming portion in a stacking
`
`
`
`direction of the first and second internal electrodes, and margin
`
`
`portions disposed on opposite sides of
`
`10
`
` from the cover portions and the
`
`
`
`margin portions has peaks detected in each of a D-band and a G-band
`
`in Raman analysis.
`
`[0024] The capacitance forming portion may have a peak which is
`
`
`
`detected in only one from among the D-band and the G-band in Raman
`
`
`
`15
`
`analysis.
`
`
`[0025] The at least one selected from the cover portions and the
`
`
`margin portions may include a plurality of dielectric grains and
`
`
`a grain boundary formed between adjacent dielectric grains and the
`
`graphene boundary may have a peak detected in a Raman analysis in
`
`20
`
`
`the D-band and the G-band.
`
`
`[0026] The D-band may be at 1300
`
`cm! to 1400 cm4, and the G-band
`
`may be at 1500 cm?! to 1600 cm}.
`
`
`[0027] The at least one selected from the cover portion and the
`
`margin portions may have a peak detected at 120 ppm to 140 ppm in
`
`25
`
`a nuclear magnetic resonance (NMR) spectroscopy analysis.
`
`Page 6
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`[0028] The at least one selected from the cover portions and the
`
`margin portions may include a plurality of graphene platelets, and
`
`
`
`some of the plurality of graphene platelets may be a graphene oxide
`
`
`
`or a reduced
`
`
`[0029] Each
`
`an electrode
`
`electrode la
`
`conductive m
`
`graphene oxide.
`
`
`
`of the first and second external electrodes may include
`
` layer and a conductive resin layer disposed on the
`
`
`yer.
`
`The electrode layer may include a glass anda
`
`
`etal including at least one selected from the group
`
`consisting o
`
` f copper
`
`(Cu), silver (Ag), nickel
`
`(Ni), and alloys
`
`thereof.
`
`The conductive resin layer may include a base resin and
`
`
`
`a conductive
`
`
`metal including at least one selected from the group
`
`consisting o
`
` f copper
`
`
`
`thereof.
`
`(Cu), silver (Ag), nickel
`
`(Ni), and alloys
`
`
`
`10
`
`15
`
`
`[0030] According to an aspect of
`
`the present disclosure,
`
`a
`
`Capacitor component
`
`includes a body including a dielectric, and
`
`
`
`pluralities
`
`
`
`of alternately stacked first and second internal
`
`electrodes disposed in the body and having dielectric layers
`
`
`
`therebetween
`
`
`. At least a portion of the body includes a plurality
`
`
`
`of graphene platelets, and a content of the graphene platelets in
`
`20
`
`
`portions of
`
`
`the body outside of the dielectric layers disposed
`
`between the
`
` first and second internal electrodes is higher than
`
`a content
`
` fF
`of
`
`the graphene platelets in the dielectric layers
`
`disposed between the first and second internal electrodes.
`
`[0031] The body may include an upper cover portion disposed above
`
`25
`
`an uppermost
`
`
`
`internal electrode of the stacked first and second
`
`Page 7
`
`
`
`
`
`
`
`
`
`the First and second
`internal electrodes ina stacking direction of
`
`
`
`
`
`internal electrodes,
`
` Docket No.: 123193-8242-US
`
`a
`
`lower cover portion disposed below a
`
`lowermost
`
`
`internal electrode of
`
`the stacked
`
` first and second
`
`internal electrodes in the stacking direction,
`
`
`
`disposed between lateral edges of the
`first and second internal
`
`and side portions
`
`
`
`lectrodes and side sur
`
`latelets in at least
`
`
`
`faces of!
`
`F the body.
`
`
`A content of the graphene
`
`
`one of
`
`the upper cover portion,
`
`the lower
`
`cover portion, and th
`
`e side portions may be higher than a content
`
`e
`
`bp
`
`oO
`
`
`
`
`
`
`
`f the graphene platelets in the dielectric layers disposed between
`
`10
`
`the
`
`first and second internal electrodes.
`
`[0032]
`
`
`The dielectric layers disposed between the stacked first
`
`and second internal electrodes may be
`
`
` free of
`graphene platelets
`
`at positions between
`
`the stacked
`
`
`first
`
`and
`
`second internal
`
`
`
`electrodes.
`
`15
`
`
`[0033] The content of graphene in por
`
`the dielectric layers disposed between
`
`tions
`
`oO
`
`
`
`
` £ the body outside of
`
`
`
`the first and second internal
`
`electrodes may be 0.05 weight percentage (wt%) or more to less than
`
`
`2.0 wt% compared with barium titanate (BaTi0O;).
`
`20
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`[0034]
`
`The above and other aspects,
`
` features, and advantages of
`
`
`
`the present disclosure will be more clearly understood from the
`
`following detailed description,
`
`taken in conjunction with the
`
`accompanying drawings,
`
`in which:
`
`Page 8
`
`
`
` Docket No.: 123193-8242-US
`
`
`FIG.
`
`1
`
`is a perspective view of
`
`a capacitor
`
`component
`
`according to an exemplary embodiment
`
`in the present disclosure;
`
`
`FIG.
`
`2
`
`
`FIG. 1;
`
`
`
`I-I’
`is a cross-sectional view taken along line
`in
`
`
`FIG.
`
`
`
`
`
`
`
`-II’ in
`3 is a cross-sectional view taken along line
`
`
`
`
`
`
`FIG. 1;
`
`
`FIG.
`
`internal el
`
`green sheet
`
`
`4A illustrates a ceramic green sheet on which a first
`
`
`ectrode is printed, and FIG.
`4B illustrates a ceramic
`
`
`
`
`
`t on which a second internal electrode is printed;
`
`10
`
`
`FIG.
`
`5
`
`
`is a partially enlarged view of
`
`a cover portion
`
`including graphene platelets;
`
`FIG.
`
` FIG.
`
`
`
`6 is an enlarged view of region P3 in FIG. 5;
`
`7isaschematic diagram illustrating graphene platelets
`
`dispersed in grain boundaries;
`
`15
`
`
`FIG.
`
`8
`
`is a diagram illustratively showing a structural
`
`
`
` formula of
`graphene;
`
`
`FIG.
`
`9 is a graph illustrating Raman analysis results of
`
`
`
`a
`
`graphene-containing
`
`dielectric
`
`grain
`
`boundary
`
`
`(Exemplary
`
` Embodiments 1
`
`to 3)
`
`
`and a graphite-containing dielectric grain
`
`
`
`boundary (Comparative Embodiment 1);
`
`
`FIG.
`
`10 is graph illustrating a nuclear magnetic resonance
`
`
`spectroscopy analysis result of a graphene-containing dielectric
`
`grain boundary;
`
`20
`
`25
`
`
`
`FIG.
`11
`is an enlarged view of region Pl
`in FIG. 2; and
`
`
`12 is an enlarged view of region P2 in FIG. 2.
`
` FIG.
`
`
`
`
`
`
`
`Page 9
`
`
`
`
`
`
`Docket No.: 123193-8242-US
`
`DETAILED DESCRIPTION
`
`
`[0035] Hereinafter, embodiments in the present disclosure will be
`
`described in detail with reference to the accompanying drawings.
`
`
`
`
`
`
`The embodiments in the present disclosure may, however, be modified
`
`
`
`
`in many different forms, and accordingly,
`
`
`the scope of the present
`
`
`
`disclosure should not be construed as being limited to the
`
`
`embodiments set forth herein. Rather, these embodiments are shown
`
`
`
`and described to provide a thorough understanding to those skilled
`
`10
`
`15
`
`20
`
`inthe art. Accordingly, inthe drawings, the shapes anddimensions
`
`
`
` of elements may be exaggerated for clarity, and the same reference
`
`
`
`numerals will be used throughout
`
`to designate the same or like
`
`elements.
`
`[0036] Further,
`
`in the drawings, irrelevant descriptions will be
`
`omitted to clearly describe the present disclosure, and to clearly
`
`
`express a plurality of
`
`layers and areas,
`
`thicknesses may be
`
`
`
`
`magnified. Elements having the same function within the scope of
`
`
`
`the same concept will be described with use of the same reference
`
`
`
`
`
`
`the specification,
`
`it will be
`
`numeral.
`
`Further,
`
`throughout
`
`
`
`
`understood that when a part “includes” an element, it may further
`
`include another element, not excluding another element, unless
`
`otherwise indicated.
`
`[0037]
`
`
`
`In the drawings, an X direction may be defined as a second
`
`direction, an L direction, or a length direction,
`
`a Y direction
`
`25
`
`
`may be defined as a third direction,
`
`a W direction, or a width
`
`Page 10
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`
`direction, and a Z direction may be defined as a first direction,
`
`
`a lamination direction, a T direction, or a thickness direction.
`
`
`
`Capacitor Component
`
`[0038]
`
`
`FIG.
`
`1
`
`
`is a perspective view of a capacitor component
`
`according to an exemplary embodiment.
`
`
`
`
`
`view taken along line I-I’ in FIG. 1, and FIG. 3isacross-sectional
`
`
`FIG.
`
`
`
`
`
`2 is a cross-sectional
`
`
`
`
`
`
`
`
`
`
`
`-II’
`in FIG. 1.
`FIG.
`view taken along line
`
`4A illustrates a
`
`
`
`ceramic green sheet on which a first internal electrode is printed,
`
`
`
`
`and FIG.
`4B illustrates a ceramic green sheet on which a second
`
`
`
`internal electrode is printed.
`
`
`[0039] Hereinafter,
`
`a capacitor component 100 according to an
`
`
`
`exemplary embodiment will be described with reference to FIGS.
`
`1
`
`
`to 3, 4A, and 4B.
`
`[0040] A capacitor
`
`component
`
`100 according to an exemplary
`
`
`embodiment includes a body 110 and external electrodes 131 and 132.
`
`
`
`The body 110 includes a plurality of dielectric layers 111 and first
`
`
`
`
`
`and second internal electrodes 121 and 122 alternately disposed
`
`
`to face each other with respective dielectric layers 111 interposed
`
`
`
`
`
`therebetween, and has first and second surfaces 1 and 2 disposed
`
`
`
`to oppose each other, third and fourth surfaces 3 and 4 connected
`
`
`
`to the first and second surfaces 1 and 2 and disposed to oppose
`
`
`
`
`
`each other, and fifth and sixth surfaces 5 and 6 connected to the
`
`
`
`
`
`
`
`first to fourth surfaces 1 to 4 and disposed to oppose each other.
`
`The external electrodes 131 and 132 are disposed on external
`
`
`
`surfaces of the body 110, and are connected to the first and second
`
`Page 11
`
`
`
`
`Docket No.: 123193-8242-US
`
`internal electrodes 121 and 122,
`
`respectively.
`
`The body 110
`
`
`includes a capacitance forming portion A,
`
`in which capacitance is
`
`
`
` formed by including the first and second internal electrodes 121
`
`
`and 122 disposed to face and overlap each other with respective
`
`dielectric layers 111 interposed therebetween, cover portions 112
`
`
`and 113 formed above and below the capacitance forming portion A,
`
`
`
`
`and margin portions 114 and 115 formed on both side surfaces of
`
`
`
`
`
`the capacitance forming portion A. At least one selected from the
`
`cover portions 112 and 113 and the margin portions 114 and 115
`
`10
`
`
`includes a plurality of graphene platelets.
`
`
`[0041] The body 110 is formed in such a manner that the dielectric
`
`layers 111 and the internal electrodes 121 and 122 are alternately
`
` laminated.
`
`
`
`
`[0042] A detailed shape of the body 110 is not limited but, as
`
`15
`
`illustrated in the drawings,
`
`the body 110 may have a hexahedral
`
`
`
`shape or a shape similar thereto. Due to contraction of ceramic
`
`
`
`
`
`powder particles included in the body 110 during a sintering
`
`procedure,
`
`the body 110 may have a substantially hexahedral shape
`
`although the hexahedral shape need not have complete straight
`
`20
`
`lines/edges/sides.
`
`
`
`[0043] The body 110 may have first and second surfaces 1 and 2,
`
`disposed to oppose each other
`
`in a
`
`thickness direction (a
`
`Z@
`
`direction),
`
`
`
`third and fourth surfaces 3 and 4, connected to the
`
` first and second surfaces 1 and 2 and disposed to oppose each other
`
`
`
`
`
`ina length direction (an X direction), and fifth and sixth surfaces
`
`
`
`25
`
`Page 12
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`5 and 6 connected to the first and second surfaces 1 and 2 as
`
`well
`
`
`
`
`as to the third and fourth surfaces 3 and 4 and disposed to oppose
`
`each other in a width direction (a Y direction).
`
`
`[0044] The plurality of dielectric layers 111 constituting the
`
`ceramic body 110 may be ina sintered state, and adjacent dielectric
`
`layers 111 may be integrated with each other so that boundaries
`
`therebetween may not be readily apparent without using a scanning
`
`
`
`
`electron microscope (SEM).
`
`[0045] According to an exemplary embodiment,
`
`
`
`o f the
`a material
`
`
`
`
`
`sufficient
`
`10
`
`dielectric layer
`
`111
`
`is not
`
`limited as
`
`long as
`
`
`
`Capacitance is acquirable.
`
`
`
`The material of the dielectric layer
`
`
`
`
`111 may be, for example, a barium titanate-based material, a lead
`
`composite Perovskite-based material, or a strontium titanate-based
`
`material.
`
`15
`
`
`
`
`
`
`for forming the dielectric layer 111 may be formed
`[0046] Amaterial
`
`by adding various ceramic additives, organic solvents, plasticizers,
`
`bonding agents, dispersants, or the like to powder particles
`
`such
`
`
`
`
`
`as barium titanate (BaTiO3) according to the objective of the present
`
`disclosure.
`
`20
`
`
`[0047] The plurality of
`
`internal electrodes 121
`
`and 122 are
`
`
`disposed to face each other with the dielectric layer 111 interposed
`
`therebetween.
`
`
`[0048] The internal electrodes 121 and 122 may include first and
`
`second internal electrodes 121 and 122 alternately disposedto
`
` face
`
`Page 13
`
`
`
`
`Docket No.: 123193-8242-US
`
`and overlap each other with a dielectric layer
`
`interposed
`
`[0049] The first and second internal electrodes 121 and 122 may
`
`
`
`
`be exposed to the third and fourth surfaces 3 and 4 of the body
`
`
`
`therebetween.
`
`
`110, respectively.
`
`10
`
`15
`
`20
`
`
`
`[0050] Referring to FIG. 2, each internal electrode 121 is spaced
`
`
`
`
`apart fromthe fourth surface 4 and exposed through the third surface
`
`
`
`3, and each second internal electrode 122 may be spaced apart from
`
`
`
`the third surface 3 and exposed through the fourth surface 4. A
`
`
`
`
`
`
`
`
`first external electrode 131 may be disposed on the third surface
`
`
`
`3 of the body 110 to be connected to the first internal electrode(s)
`
`
`121, anda second external electrode 132 may be exposed on the fourth
`
`
`
`surface 4 of the body 110 to be connected to the second internal
`
`
`
`electrode(s) 122.
`
`
`[0051] The first and second internal electrodes 121 and 122 may
`
`
`be electrically insulated from each other by the dielectric layer
`
`
`
`
`
`111
`
`interposed therebetween.
`
`The body 110 may be
`
`
`formed by
`
`
`
`alternately laminating a ceramic green sheet (see FIG. 4A), on which
`
`
`the first internal electrode 121
`is printed, and a ceramic green
`
`
`
`
`
`(see FIG. 4B), on which the second internal electrode 122
`
`
`
`sheet
`
`is printed, ina thickness direction (a Z direction) and sintering
`
`the laminated ceramic green sheets.
`
`[0052] The conductive paste may be printed using a screen printing
`
`method, a Gravure printing method, or the like, but a printing method
`
`25
`
`is not limited thereto.
`
`Page 14
`
`
`
`
`Docket No.: 123193-8242-US
`
`[0053] The
`
`capacitor component 100 according to an exemplary
`
`
`embodiment includes a capacitance forming portion A, disposed in
`
`
`
`the body 110, in which capacitance is formed by includingthe first
`
`internal electrode(s) 121 and the second internal electrode(s) 122
`
`disposed to face and overlap each other with the dielectric layer (s)
`
`111 interposed therebetween, cover portions 112 and 113, disposed
`
`
`
`
`above and below the capacitance forming portion A,
`
`and margin
`
`portions
`
`114
`
`
`
`and 115 disposed on both side surfaces of
`
`the
`
`capacitance forming portion A.
`
`10
`
`
`[0054] The capacitance formingportion Ais a portion contributing
`
`
`
`
`
`to capacitance formation of a capacitor and may be formed by
`
`
`
`
`laminating a plurality of first and second internal
`
`repeatedly
`
` 121 and 122 with a dielectric layer 111
`
`interposed
`
`electrodes
`
`
`
`between each pair of adjacent first and second internal electrodes
`
`15
`
`121 and 122
`
`[0055] The cover portions 112 and 113 include a top cover portion
`
`
`
`
`
`112 and a bottom cover portion 113.
`
`The top and bottom cover
`
`portions 112 and 113 may be formedby vertically laminating a single
`
`dielectric layer or two or more dielectric layers on top and bottom
`
`
`
`
`20
`
`
`surfaces of
`
`
`the capacitance forming portion A, respectively.
`
`[0056] The
`
`margin portions 114 and 115 include a margin portion
`
`
`
`
`
`
`
`
`
`14, disposed on or in contact with the sixth surface 6 of the body
`
`
`10, and a margin portion 115 disposed on or in contact with the
`
`
`Lu.
`
`
`
`fth surface 5 of the body 110.
`
`Page 15
`
`
`
`
`Docket No.: 123193-8242-US
`
`example, the marginportions 114 and 115 may be disposed
`
`
`e surfaces of the body 110 in the width direction.
`
`
`
`cover portions 112 and 113 and the margin portions 114
`
`[0057] For
`
`on both sid
`
`[0058] The
`
`and 115 may basically serve to prevent damage to internal electrodes,
`
`caused by physical or chemical stress, and to maintain reliability
`
`
`
` of a capaci
`
`tor component against external
`
`impacts.
`
`[0059]
`
`
`
`In the present disclosure, at least one selected from the
`
`cover portions 112 and 113 and the margin portions 114 and 115 may
`
`
`include a plurality of graphene platelets. Alternatively, only the
`
`
`
`
`
`
`
`10
`
`margin port
`
`
`ions 114 and 115 may include a plurality of graphene
`
`platelets.
`
`Alternatively, both the cover portions 112 and 113 and
`
`
`the margin portions 114 and 115 may include a plurality of graphene
`
`platelets.
`
`
`[0060] FIG.
`
`8
`
`is a diagram illustratively showing a structural
`
`15
`
`
`
`
`formula of
`graphene.
`
`
`
`
`
`
`
`
`[0061] Referring to FIG. 8, graphene llc is formed of carbon atoms
`
`
`
`
`
`
`and is in the form of a thin film having a thickness of a single
`
`carbon atom
`
`.
`
`For example,
`
`the graphene llc has a two-dimensional
`
`plate-type
`
`structure. Graphene has
`
`a
`
`
`thickness of about 0.2
`
`
`
`
`20
`
`25
`
`nanometer
`
`(
`
`
`nm) and is known to have significantly high physical
`
`and chemical
`
`stability, a conductivity more than 100 times greater
`
`than that of
`fF copper (Cu), and a mechanical strength more than 200
`
`
`er than that of steel.
`times great
`
`[0062] Accordingly,
`
`in the present disclosure,
`
`a plurality of
`
`
`graphene platelets may be contained in at least one selected from
`
`
`
`Page 16
`
`
`
`
`Docket No.:
`
`123193-8242-US
`
`the cover portions 112 and 113 and the margin portions 114 and 115
`
`
`
`to improve strength. Moreover,
`
`
`flexural
`
`s
`
`trength as well
`
`as
`
`
`
`mechanical rigidity may be secured and the
`
`component may be improved.
`
`
`
`
`life of a capacitor
`
`[0063] Although graphene is a material having various advantages,
`
`a
`
`solid
`
`content
`
`is
`
`advantageously
`
`dec
`
`reased
`
`to
`
`ensure
`
`
`dispersibility as the graphene content of ad
`
`
`is increased when slurry for molding a ceramic
`
`
`this may result in non-uniformity of the
`
`ielectric composite
`
`green sheet molding
`
`
`
`
`is prepared. However,
`
`10
`
`ceramic green sheet.
`
`[0064] Additionally, when graphene is contained in a dielectric
`
`
`layer included in the capacitance forming portion A,
`
`
`
`
`some advantageous effects such as improvemen
`
`there may be
`
`
`
`constant and the like. However, since it is difficult to control
`
`
`t in the dielectric
`
`15
`
`all graphene platelets to be disposed in desired locations even
`
`when the dispersibility is ensured, humidity resistance reliability,
`
`a breakdown voltage, or the like may be dete riorated.
`
` f graphene platelets
`
`[0065]
`
`
`
`Inthe present disclosure, apluralityo
`
`may be contained in at least one selected from the cover portions
`
`20
`
`
`112 and 113 and the margin portions 114 and115 without significan
`
`
`changing a capacitor manufacturing method according to a rela
`
` tly
`
`ted
`
`art.
`
`
`
`In this way, the strength of the body 110 may be improved and
`
`
`
`a composite of the capacitance forming portion A may be maintained
`
`
`asitis. Thus, the amount of graphene used may be reduced to achieve
`
`Page 17
`
`
`
`
`Docket No.: 123193-8242-US
`
`improved
`
`technical
`
`accessibility and
`
`improved
`
`commercial
`
`accessibility.
`
`[0066] As
`
`a result, according to the present disclosure,
`
`the
`
`capacitance
`
`
`forming portion A may
`
`not
`
`include
`
`graphene.
`
`Alternatively,
`
`
`the capacitance forming portion A may have a lower
`
`graphene content level than the cover portions 112 and 113 and the
`
`
`
`margin portions 114 and 115 that contain graphene platelets.
`
`[0067] Further, since a binder, an additive, or the like needs to
`
`be changed to control
`
`
`the content and locations of graphene
`
`platelets contained in the dielectric layers included in the
`
`
`
`
`there is difficulty in using an
`
`
`Capacitance forming portion A,
`
`existing method as it is.
`
`[0068] For
`
`example,
`
`rather
`
`than
`
`using
`
`polyvinyl
`
`butyral
`
`
`(PVB) -based binder that is generally used ina dielectric composite,
`
`
`
`an acrylic binder including an acrylic copolymer-graphene composite
`
`may be used to control
`
`
`the content and locations of graphene
`
`platelets contained in the dielectric layer
`
`included in the
`
`
`capacitance forming portion A.
`
`[0069] However,
`
`in an exemplary embodiment,
`
`no graphene
`
`is
`
`
`
`
`contained in the capacitance forming portion A, while graphene is
`
`contained in at least one selected from the cover portions 112 and
`
`
`
`
`
`
`
`
`
`113 and the margin portions 114 and 115.
`
`For
`
`this reason,
`
`a
`
` PVB-based binder may be used, and a capacitor component may be
`
`
`manufactured without significantly changing a method according to
`
`
`
`a related art.
`
`Page 18
`
`10
`
`15
`
`20
`
`25
`
`
`
`
`Docket No.: 1231
`
`93-8242-US
`
`[0070]
`
`
`Hereinafter,
`
` graphene
`a case in which a plurality of
`
`platelets are contained in the cover portions 112 and 113 will be
`
`described. However,
`
`the description may be equivalently applied
`
`
`
`to a case in which a pl
`urality of graphene platelets are contained
`
`
`
`in the margin portions 114 and 115.
`
`Moreover,
`
`the description may
`
`
`be equivalently applied to a case in which a plurality of graphene
`
`platelets are contained in both the cover portions 112 and 113 and
`
`the margin portions 114 and 115.
`
`[0071]
`
`FI
`
`G.
`
`
`5 is a partially enlarged view of
`
`the cover portions
`
`10
`
`
` G.
`112 and 113 including graphene platelets, andFI
`
`6 is an enlarged
`
`
` IG. 5.
`view of region P3 in FI
`
`[0072]
`
`
` [GS.
`Referring to FI
`
`5 and
`
`6,
`
`the cover portions
`
`
` fF dielectric crystal
`may include a plurality o!
`grains 11] a, a grain
`
`112 and 113
`
`
`
`boundary l11b
`
`
`formed between adjacent dielectric grains lla,
`
`and
`
`15
`
`aplurality ot
`
`
`
`F graphene platelets llcunit
`
`
`formly distributed in grain
`
`
`
`boundaries 1lb.
`
`[0073]
`
`FI
`
`G.
`
`7
`
`is
`
`a
`
`schematic
`
`diagram
`
`boundaries.
`
`illustrating graphene
`
`
`G.
`/, grain
`
`n
`
`Fy a distribution
`
` form i
`
`n relation
`
`F
`
`platelets
`
`dispersed
`
`in grain
`
`boundaries are omitted to clarii
`
`
`
`20
`
`to the dielectric crystal
`
`grains
`
`lla,
`
`and the dielectric crystal
`
`a are simply shown in a polyhedron to show the top and
`
`f the polyhedron.
`
`grains 11]
`
`
`Side surfaces of
`
`[0074]
`
`As illustrat
`
`may be disposed al
`
` ted in FI
`
` G.
`
`7,
`
`
`
`one surface of the graphen
`
`e llc
`
`
`
`Faces and side surfaces of
`long top suri
`
`the
`
`
`
`Page 19
`
`
`
`
`Docket No.:
`
`123193-8242-US
`
`dielectric grain lla.
`
`
`
`For example, one surface of the graphene lic
`
`
`
`may be disposed along the surface of the dielectric grain lla.
`
`[0075]
`
`
`
` Some of the plurality o!
`
`fF graphene platelets may exist in
`
`a laminated state,
`
`but only 5 percent
`
`(3)
`
`
`or less of
`
`the total
`
`graphene platelets may be in the laminated state with 10 or more
`
`
`
`laminated layers of
`graphene.
`
`This is because when more than 5%
`
`
`
`
`
` of the total graphene platelets is in
`
`
`or more laminated layers of
`
`
`dispersibility of graphene
`
`the laminated state with 10
`
` there is a possibility that
`
`graphene,
`
`is deteriorated to cause a strength
`
`
`
`
`
`
`10
`
`
`
`improving effect
`
`
`to be non-uniform.
`
`
`forming the cover portions 112 and 113
`[0076] A material
`or
`
`including a plurality of
`
`graphene platelets may be prepared by
`
`
`adding aplurality of
`
`
`graphene platelets to barium titanate (BaTiOs;)
`
`powder particles.
`
`According to
`
`
`objectives of
`
`the present
`
`15
`
`disclosure,
`
`various ceramic additives,
`
`plasticizers, binders,
`
`dispersing agent,
`
`and the like may be added thereto.
`
`[0077]
`
`
`On the other hand,
`the content of graphene may be set in
`
`
`
`
`consideration of target strength, a sizeof
`the capacitor component,
`
`and a lamination number,
`
`but is
`
`limited
`
` thereto.
`
`20
`
`[0078] However,
`
`
`the content of
`
`graphene contained in the cover
`
`portion is, in detail, 0.05 weight percentage
`
`wt%) or more to less
`
`than 2.0 wt%, compared with barium titanate (BaTi0Os;)
`
` the cover portion.
`
`contained in
`
`
`
`[0079]
`
`
`When the content of
`graphene is less than 0.05 wt3,
`
`
`
`
` Ficient. When the content
`
`
`
`strength improving ef
`fect may be insuf
`
`the
`
`25
`
`Page 20
`
`
`
`
`Docket No.: 123193-8242-US
`
`
`
`of graphene is more than 2.0 wt%, dispersibility of the graphene
`
`
`is deteriorated and viscosity of the graphene is increased during
`
`
`
`
`
`
`mixture of materials. Accordingly, it is difficult to uniformly
`
` distribute graphene platelets.
`
`[0080]
`
`
`
`
`To uniformly disperse the graphene platelets, a surface of
`
`
`
`the graphene may be modified such that an instability index of the
`
`graphene is controlled to be 0.1 or less. This is because graphene
`
`
`platelets should be applied to slurry in an environment of
`
`
`ethanol-toluene mixed solvent, while they are uniformly dispersed,
`
`10
`
`
`to obtain graphene platelets uniformly dispersed ona grain boundary
`
` after they are sintered.
`
`[0081] The
`
`
`instability index is a criterion for evaluating
`
`dispersibility,
`
`and may be a value measured using a LUMiSizer
`
` Dispersion Analyzer.
`
`15
`
`[0082] The external electrodes 131 and 132 are disposed on external
`
`
`
`
`surfaces of the body 110 and are connected to the first and second
`
`
`
`internal electrodes 121 and 122. Similarly to the shape shown in
`
`the external el
Accessing this document will incur an additional charge of $.
After purchase, you can access this document again without charge.
Accept $ Charge
Still Working On It
This document is taking longer than usual to download. This can happen if we need to contact the court directly to obtain the document and their servers are running slowly.
Give it another minute or two to complete, and then try the refresh button.
A few More Minutes ... Still Working
It can take up to 5 minutes for us to download a document if the court servers are running slowly.
Thank you for your continued patience.
This document could not be displayed.
We could not find this document within its docket. Please go back to the docket page and check the link. If that does not work, go back to the docket and refresh it to pull the newest information.
Your account does not support viewing this document.
You need a Paid Account to view this document. Click here to change your account type.
Your account does not support viewing this document.
Set your membership
status to view this document.
With a Docket Alarm membership, you'll
get a whole lot more, including:
- Up-to-date information for this case.
- Email alerts whenever there is an update.
- Full text search for other cases.
- Get email alerts whenever a new case matches your search.
One Moment Please
The filing “” is large (MB) and is being downloaded.
Please refresh this page in a few minutes to see if the filing has been downloaded. The filing will also be emailed to you when the download completes.
Your document is on its way!
If you do not receive the document in five minutes, contact support at support@docketalarm.com.
Sealed Document
We are unable to display this document, it may be under a court ordered seal.
If you have proper credentials to access the file, you may proceed directly to the court's system using your government issued username and password.
Access Government Site
