llIIlIlllIlIlIllIlIllIllIllIIIIIIIIIIIIIIIIIIIIllIIlllIllIIllIIlllIlIllIIllIIIIIIIIIIIIIII
`US 20110210696A1
`
`(») United States
`(12) Patent Application Publication (io) Pub. No.: US 2011/0210696 A1
`Sep. 1, 2011
`Iuoue
`(43) Pub. Date:
`
`(54) VOV-CONTACT TYPE IV)WEB RKCEIYING
`APPARATUS, EI,KCTROVIC EQUIPYIKVT
`AVD CIIARGI)VG SYSTFYI USING TIIE
`POWER RECEIYIVG APPARATUS
`
`Publication Classiiication
`
`(51)
`
`Int. CL
`/f02,/ 7/00
`(52) U.S. CL .........
`
`(2006 01)
`
`..... 320/108
`
`(75)
`
`Inventor:
`
`Tetsuo lnoue, Kanagawa-Kcn (IP)
`
`(5 /)
`
`ABSTRACT
`
`(73) Assignees:
`
`Kabushiki Katsha Toshiba. Tiilyo
`(JP); Toshiba 3taterials Cos Ltd.,
`Yokohama-Shi (JP)
`
`(21) Appl. Noc
`
`12/674,347
`
`(22)
`
`PCT 1'ded:
`
`Aug. 20, 2008
`
`(86)
`
`PCT Noc
`
`PCT/JP08/64787
`
`ss 371 (c)(l),
`(2), (4) Date.
`
`Fcb. 19, 2010
`
`(30)
`
`Foreign Application Priority Data
`
`Aug. 21. 2007
`
`(JP) .......
`
`... 2007-214503
`
`A non-contact type power receiviii apparatus inchiding: a
`power receiving coil havings spiral coil: a rectifier: a second-
`ary battery, mi electronic device operated by being supplied
`with direct voltage from the secondary battery, v;herein a
`composite magnetic body is provided to at least one portion
`lictwcoli the sccmidary battery and ilm spiral coil, and a por-
`tion behveen the electronic device and the spiral coil. The
`composite magnetic body includes at least first and other
`layers of magnehc sheets throu ban uisulatuig layer ui wluch
`when a relative magnetic permeability of the first usa@retie
`
`permeability of the other mamtetic sheets other than the first
`magttettc sheet is uu, aud a total thickness of the other miig-
`nenc sheets is tu. the composite ma cetic body satisfies the
`following relations pd td=-60 (mm(, and lui hi==100 [mm].
`
`sheet provided ui a side of the spiral coil is pd. a ihicknmsol'helirst magnetic sheet is hi, an avemge relative magnetic
`
`16
`
`13
`
`11
`
`32
`
`31
`
`30
`
`Petitioner Samsung and Google Ex-1010, 0001
`
`

`

`Patent Application Publication
`
`Sep. 1, 2011 Sheet 1 of 3
`
`US 2011/0210696 Al
`
`Petitioner Samsung and Google Ex-1010, 0002
`
`

`

`Patent Application Publication
`
`Sep. 1, 2011 Sheet 2 of 3
`
`US 2011/0210696 Al
`
`14
`
`12
`
`F I G. 2
`
`Petitioner Samsung and Google Ex-1010, 0003
`
`

`

`Patent Application Publication
`
`Sep. 1, 2011 Sheet 3 of 3
`
`US 2011/0210696 Al
`
`F I G. 3A
`
`F I G. 3B
`
`16
`
`13
`
`11
`
`32
`
`31
`
`30
`
`Petitioner Samsung and Google Ex-1010, 0004
`
`

`

`(]S 20[]/02]0696 Al
`
`Sep. 1, 2011
`
`NON-CONT'ACT TYPE POSVER RECEIVING
`APPARATUS, EI,KCTRONIC KQUIPVIENT
`AVD CHARGING SYSTEM USING TIIE
`POVVKR RKCI&IVIIVG APPARATUS
`
`TE('HNICAL FIELD
`
`equipm-
`
`I'he present invention relates to a non-contact (con-
`[UUUI]
`Iactles s) type power receiving appamtus, an clectmnic
`entt (electronic apparatus) and a clmrging system (battery
`ct'Ialrgl&lg sv'stet&i) n s&llg tile &in 1'I-c&1&lt ac I type pe&ver receiv&llg
`appar itus that are capable ofperfornung a non-contact power
`charging in various electronic equipments such as cellular
`phone. video camem and so on.
`
`BACKGROUND ART
`
`In recent years, a development of handhold commu-
`[0002]
`nication gadgets is remarkable. L'specially, downsizing and
`reductioninucightol'mobilepboneshmvadvwircd Funher,
`vnth respect to also venous electmnic equipments such as
`video camera (handy camem or the like), codeless phone,
`lap-top personal computer (notebook type personal com-
`puter) other than the mobile phone, such the dov,nsizin and
`reduction in weight have been also advanced.
`Since these electronic equipments are provided with
`[0003]
`a sccondnry battery to an electronic npripment body, the
`electninic equipments can be available without plug ing in.
`so tliat a portability and convenience have been greatly
`improved. At the present time. a nipacity of the secondaD is
`limited to some extent, so that the secondary battery is nec-
`essary to be performnl &vitfi a power-cfrarging opcratiwi at
`least once every several days to several weeks.
`[0004] As a pow vr charging method, there are two types of
`clmrging methods: a contact-type charging system: and a
`non-contact type charging system. The contact-type charging
`system is a system in wluch an electrode of a power receiving
`appamtus and an electrode ofa pow er supplying apparatus are
`directly connactsxt to each other thereby to perform the povver
`char ing. The contact-type charging system has a sunple
`structure for constituting the apparatus, so that the contact-
`Iypc charging system has been gnmcally adopted in wide
`'&pphcstion tiefd
`in accordance with thc progress of the
`[0005] However.
`dovi nsizing and reduction in weight of the electronic equip-
`mcnts in recent years, there hns been posed pmblems such
`diat a weight ofeach electro iuc equipments is reduced, so tlmt
`a contact pressure between the electrode ofthe power receiv-
`uig uppnratus and tbc clectmdc ol the pow er supplying nppa-
`ratus becomes insufficient thereby to cause a charg&n defect
`(charging fault). Further, the secondary batter has a small
`'&I us'e
`I'& vista&1& v I&i lie &L s&1 If&at it is u&mcssary I&1 i&sold '& tell&pet
`nse of the secondary battery. and a circuit design requires to
`bc carefully performed so as not to cause an over discharge
`and an overcharge. In order to nips with these pmblems. the
`non-contact type charging system has been review ed in these
`din&a.
`[0006] The non-contact type charguig systnn is a power
`charging system utilizing an efectromag&tetfc induction
`caused by coils provided to both the power receiving apparn-
`tus and the power supplying apparatus. In tlus type of tire
`elm&ging system, due to the non-contact type, there is no need
`to pny a nant ion to the nmtact pressure betuvwi the electrodes
`ofthe two npparutuses. I'urther, it is unnecessary to pny atten-
`tion to the contact pressure. so that a stable charging voltage
`
`can be supphed without beuig inliuenced by the contacting
`state of the electrodes of tile appar"i&1&ass
`[0007] Thc conventional non-nmtact type chargmg systwn
`has been used for electronic equipments such as electric
`toothbn&sh, electric shaver or the like that are driven by a low
`power consunipti&m and require a long chargin tin&a. As the
`hikes
`secondary battery at that time, a nickel-hydrogen battery is
`niainly used, so that most of the nickel-hydrogen batteries
`reqinre a long charging time of about 8 hours. In recent years,
`as a novel secondary battery, a
`capacity and hi/st density
`batteries such as lithium-ion secondary battery or the hke
`have come into existence. As a result, with respect to the
`electronic equipments such as mobile phone, personal com-
`puter or the like that are driven by a high power consumption
`and require a rapid clmrging operation, the non-contact type
`clmrging systcni has been eagerly reviewed in these days.
`[0008] As one exnmpfe of Ihc wm-contact type charging
`appamtus, there have been pmposed systems in Japanese
`IJimxamincd Patent Application Publication No. 11-26&5814
`(Patent Docs&&le&it 1) or Jape&lese U&lexa&llined Patent Appli-
`cation Publication No. 2000-23393 (1'atent i)neo&neat 2).
`Both systems a&kipt a stnicnuc in i&hich a fi:rrite ccrc is usni
`as a magnetic core uid n coil is ivowul around the nuignetic
`core thereby to realize the apparatus which is reduced in size.
`Funher, in tlm charging apparatus disclosed in Japa-
`[0009]
`nese Unex unined Patent Application Pubhcation No.
`9-190938 (1'atent Dociunent 3). ferrite powder and amor-
`phous powder are mixed tlmreby to f&mn n re~in substram and
`a coil or the like is mounted on the resin substmte thereby to
`reahze the clmrging appamtus rsxiuced in size wid thickness.
`[0010] However, when fcrritc is ivorkni to be thin shape,
`ihe thin fernte becomes bnttle uid has a low impact resis-
`tance, so that there hns been posed a problem such that the
`power receiving system turns out ui be defi.et&vs duc hi a
`dmpping or collision or the like of the appwatus, Further. ui
`order to reduce a size in thickness of a power receiving por-
`uon so as to corresp&md ui the risfuction in thickn&mss of the
`electronic equipment. there has been adopted a plmiar coil
`which is formed by printing a nmtal powder paste onto n coil.
`As one cx miple of structure f&ir strengthening bondage by
`using the planar coil and a magnetic shsmt, there have been
`proposed tlm stn&ctures disclosed in Japanesv. Unexwnined
`Lftility Model Apphcat&on Publication No. 58-80753 (Patent
`IJocument 4). Japanese Unexaminsxi I'a&ant Application Pub-
`lication No 4-122007 (Patent Document 5) or .lap mesc
`Unexamined Patent Application Publication No. 8-148360
`In these proposed structures, a mag-
`(Patent Dociunent 6&)
`nenc body (may&etre sheet) is used as a core material for
`strengthening the bondage bete een a primary coil and a see-
`m&dary coil
`[0011] On Ihe other i&and, when an electric Iransniission
`mte is &ncreased to be large, defects due to heat genemtion are
`liable to occur at ponions not only tlm bondage between
`adlacent transformers but also peripheral parts of the trwis-
`formers. )hat is, in a case where the plwiar coil is used, a
`magnetic llox passin ihrough the planar coil is inierlinkcd ui
`a substraie or the like provided uiside the equipmenL so that
`a tnnperaturc of an inside of the apparatus is increased to
`generate heat due to oddy current causnt by electromagnetic
`induction. As a result, there has been posed a problem such
`tlmt high electric povver cannot bv transmitted and it takes
`ion time to clmr e the electnc&ty.
`To cope with ttus problem. the &nagnetfc body
`(mag-
`[0012]
`netic sheet) is used as also a shielding member with respect to
`
`Petitioner Samsung and Google Ex-1010, 0005
`
`

`

`(JS 20[[/02[0696 Al
`
`Sep. 1, 2011
`
`a rear surface. In order to obtain a sufhcient shielding effect,
`it has hemi cmisidcrcd that if the luagl1ctic body (magnetic
`sheet) luis the huger nuigneuc permeability or the wider area
`or die larger thickness, the more ctf ctive shielding effect can
`be obtained.
`Further. in order to increase the electric tninsmis-
`[0013]
`sion rate. it is required to increase the clcctric power How-
`ever. when the electric transmission is continued ki a me tnl lie
`body. the metallic body generates heat due to the eddy current
`caused in thc metallic body Thercliire.
`is nccccssaty to
`it
`provide the folloiving safety system. For example, In a case
`where a coil of a power transmitting (power supplying) appa-
`ratus Is a primmy coil wlnle a coil of a poiver receivuig
`apparatus is B secondm 7 coil and the pnmary coil is used as an
`antmun of RF-ID tag (radio-frequency-identification tag),
`the safety system iudges whether or not the secondary coil
`exists at upper portion ofthe primary coil on the basis of a RF
`Blgfxd
`Iiouever. in tins case, when uiductance of the pn-
`[0014]
`mary coil is greatly clmnged in accordance with a positioim1
`relationshipbetweenthentagncticlxrdy(nragneticsheet) and
`the coil of the power trunsmitting apparatus side. a resonant
`flcqilLIIcv of a resonant circuit provided to a side ol'hc
`pnnlaiy cod for powct ti'Bilslllltllllg Is also greatly vai Icd, so
`that there has been cmised defects such that a sutficicnt reso-
`nance cannot bc obtained mid the Bio~a mimmui cminot func-
`uon well.
`Patent l)ocummit I: Japmiesc Unexamincxi Patent
`[0015J
`Application Pubbaition No 11-265814
`I'atent Document 2: .iapanese Unexamined Patent
`[0016]
`Application Publication No 2000-23393
`Patent Document 3: Japanese Unexmnined Patent
`[0017]
`Application I'ublication No. 9-190938
`Patent Docunwnt 4 Japanese IJnexmnincd Utility
`[0018]
`Model Application Publication No. 58080753
`Patent l)ocument 5: Japanese Unexamincxi Patent
`[0019J
`Application Publicauon No. 4-122007
`Patent Document 6: lapanese Unexamined Patent
`[0020]
`Application Pubhcation No 8-148360
`
`DISCI.OSURF, OF INVI!NTION
`
`[0021] As described above, in the power rcecciving appam-
`tus for the conventional non-contact type clmr Ing system.
`the magnetic body (magnetic sheet) having a high pcnncabil-
`ity mid a large volume is provided BI a surliace of the second-
`ary coil, the surface being opposite to a side of the primary
`coil. fiir Ihe purpose of strengthening tlm bondage to improve
`an efficiency of the electric power transmission and for the
`purpose of improving the shielding property thereby to sup-
`pI'Lss fljc heat gi:BLIai1011 Acconlii18 Io 81c BbovL conven-
`tional arrangement. there lms been POSIBI pmblems such tlmt
`a fluctuation in inductance of the primary coil becomes
`notable. and an operatin condition of the resonance circuit is
`condition
`disadvantageously deviated from resonance
`capableofexlubitinga suflicienteffcxtinaccordancewith the
`positional relationslup between the magnetic body and the
`primary coil.
`[0022] The present invention had been achieved to solve the
`aforementioncxi problmns, and an object ofthe present inven-
`uon Is to provide a power receiving apparatus capable of
`improving the resonatuig property (resonation property) and
`capable of suppressing the heat generation. Thcrefiirc.
`according to the electronic equipmetit and the power receiv-
`ing system using the power receiving apparatus ofthe present
`
`invention, it becomes possible to increase the tmsnsmitting
`electncity. Bnd it becomes also possible to shorten the charg-
`illg tiinm
`To acl»eve the above obiect. the present invention
`[0023]
`provides a non-Contact type power rcvciving appamtus com-
`prising a power receiving coil Imving a spiral coil, a rectifier
`voltage
`for rectifying alternative voltage (AC voltage) generated at
`the power receiving coil; a secondary battery for being
`(DC'oltage) which is rectified by
`clmrged with direct
`the rectiiier: and an electronic device operated by being sup-
`plied with the direct voltage from the secondary battery,
`w herein I he noncontact type poiver receivuig apparatus fur-
`ther comprises a composite magnetic body which is provided
`to at lexst ono portiim between the scvondary battery and the
`spiralcoil.atidnportmnbetweentheelectmnicdevice mdIhe
`spiral coil, wherein the composite magnetic body comprises
`at lmist two layers including iirst mul other layer. of magnetic
`sheets (magnetic ribbons) tluough an uisulating layer In
`which when a relative magnetic p amicability ofthe first mag-
`netic sheet provided to a side of the spiral coil Is denoted as
`pd, B thickness ofthe first magnetic sheet is denoted as tu, an
`average relative magnetic pernmability of the other layers of
`magnetic sheets other than the iirst magnetic sheet is denoted
`as pu, and a total thickness of the other layers of magnetic
`sheeh is denoted as tu, the composite magnetic body satisfy
`the followin relations: pdtd==-60 [mmJ: and putu—= 100
`[mm[
`lathe above non-contacttypepowerreceivingappa-
`[0024]
`catus, it is prcfi'rablc that thc compo site magnetic body satisfy
`the lel lowing relation: (gu tu)!()Id td)==-'10.
`Further, It is also preferable that the first maytettc
`[0025]
`sheet has a surface area larger than that of the other layers of
`the mngnetic slmcts, it is morc prefi:rable that thc insulating
`layer of the composite magnetic body is composed of resin
`containing magnetic powder, and it is also prefemble that a
`distance between the iirst magnetic sheet and the other m ig-
`netic sheets is 30 iun or more. Furthermore, it Is also prefer-
`able that a total thickness ol'ihc composite magnetic body is
`0.3 mm or less. and the secondary battery is a Li-Ion second-
`ary battery.
`[0026J The non-contact type poiver receiving apparatus
`according to the present invention is suitably applied to vari-
`ous elcmtronic equipments Further. when tlie elcectronic
`equipment of this invention is provided to a non-contact type
`power charging apparatus, there can bc also provided a charg-
`uig system capable of charguig electncity to tlie electroiuc
`cqu Iplllcitt.
`
`LII'FL'CTS OI'IIL'NVLINTION
`
`[0027] Accordm to the present invmiuon, the composite
`mabrnetic body comprising a plurality of magnetic sheets
`(magnetic ribbons) is provided to at least one portion bctw ccn
`ihe spiral coil (power receiving side spiral coil a secondary
`coil) and tlm secondary battery, mid a portion between the
`recufier and thc spiral coil Thcrclorc. magnetic flux gener-
`ated from a power charging side spin l coil (a primary coil) is
`prcventcxI from interlinking with a circuit board and tlm scm-
`ondary battery or the like. and inductance vananon In the
`preliminary coil, which is caused by absence or presence of
`the scccondary coil. is controlled while noise and heat genera-
`tion onginated by induced electromonve force (electromag-
`netic inductionj are suppressed, so that a resonating property
`
`Petitioner Samsung and Google Ex-1010, 0006
`
`

`

`US 20 [ [/02 [0696 A I
`
`Sep. 1, 2011
`
`3
`
`of a resonance circuit constituted by the primary coil
`is
`improved whereby mi oscillation can bc eifi:ctivcly con-
`trolled.
`
`BRIEI'ESCRIPTION OF TIIE DR.VVINGS
`
`I is an cxplodcd perspective view sl»swing un
`[0028]
`FICi
`embodiment of the power rseceiving apparatus according to
`the present invention.
`[0029] FI(i 2 is an exploded perspective viesv slxiwing
`another embodiment of the power receiving apparatus
`according to the present invention.
`[0030] Fl(i. 3 is a cross ssectionol view shou:ing one
`embodiment of a composite mayietic body compn sed by the
`poii er receiving ap para ni s according to tire present invention.
`FIG. 4 is a cross sectional view showing one
`[0031]
`embodiment of a power charguig system according to the
`present invention.
`
`BES f MODE FOR ('ARRYING OUI'Hk
`INVFNTION
`
`I'IG. I is an exploded perspective vieis showing one
`[0032]
`embodiment of the power receiving apparatus according to
`the presvnt invention FICi 2 is im exploded perspective view
`showing another embodiment of the power receiving appam-
`tus nccording to tlm present invention ln tlm drawings, a
`reference numeml I denotes an electronic apparatus, a refer-
`ence numeral Z denotes a power receiving apparams, a refer-
`ence nunmral 3 denotes mi electronic apparatus body. a ref-
`erence numeral 4 denotes o casing, o reference numeral 11
`denotes a spiral coil, a reference numeral 12 denotes a recti-
`fier. a reference numeral 13 denotes a secondary battery, a
`reference numeml 14 denotes an electroiuc device provided
`to thc elcmtronic appamtus body, a rcli.rance nunmral 15
`denotes a circuit bo ud for inouunng the electnmic device,
`and a reference mimeml 16 denotes a composite magnetic
`body
`I shows an mnbodiment uherc the
`Further. FICi
`[0033]
`composite magnetic body 16 is provided to a portion between
`tlm spiml coil I I and tlm scmondary battery 13, while Fl(r 2
`shirus an embodiment uhere the m»uposite magnetic body
`16 is provided to a portion between the electronic device 14
`and the spiral coil 11
`[0034] At first, the pouer recco uig apparatus ofthe present
`invention comprises the spiral coil: thc roctitier; the second-
`ary battery, and the electronic device. Tlm spiral coil is imt
`particularly limited, but may be fomied by winding metal
`wire such as copper or thc like, or fornwd by a planar coil
`wluch is fonued by printing metal pou der paste. followed by
`dryingtheprintedposte. Further,awindingshapeofthespiral
`coil is not particularly limited, but mov bc lisrmcd into circu-
`lar. elliptical-shape, or rectangular-shape, polygonal-shape.
`A winding number of the spiral coil may bc controlled in
`accordance with the required chamctenstics.
`Further, the rectifier is fiirmed of various semicon-
`[t)l)35]
`ductor elements such as transistor, diodi. mid so on Further-
`more, the number of the rectifier is arbitranly specified, so
`that one or at least twn rcctifiers are provided so as to meet
`requirements. In tlus regard, altlxmgh the rectifier 12 is pro-
`vided to an anterum-side of the circuit board 15 as shown in
`FIC) I, thc rcctiticr 12 may also be provided to a surface
`opposed to the antenna. I'urther, the rectifier muy also be
`formed by o film-fanning teclmology such as TVT or the like.
`
`lite secondary battery 13 is capable of charging)
`[0036]
`discharging electricity, and there min bc use»I sewn»dary bat-
`tenes having ramous shapes such as plain-shape, button-
`I'lm electronic device 14 denoms various elements
`shape.
`such as resistaime element, copaciuitive element. inductance
`element. conuolling element or the hke for constituting a
`circuit Further, the circuit board 15 is an insulnting bomd
`composed ol resin lilm or ceramic substrate or the like onto
`wliich the electronic devices are mounted thereby to form the
`circuit
`[0037] The composite magnetic body 16 compn sea at least
`two layers of mngnetic sheets (magnetic ribbons) through an
`insulating lnyer In thc magnetic sheets of at least fis o layers,
`a magnetic sheet provided to a side ofthe spiral coil is referred
`as a first niagnetic sheet, while magnetic sheets other than thc
`first magnetic sheet are referred as subsequent (ofter second,
`or the other) magnetic sheets. The magnetic sheets after sec-
`ond are called as a second mngnctic sheet, n third magnetic
`and so on in turn from a side of the first mayietic
`sheet,
`slice t. I hci'c fore, ill case iif two la)mls (if tile lililgllc tie slmcts,
`the composite ms Cetic body composes: a lirst magnetic
`sheet and a second magnetic sheet from the side of the spiml
`coil While, in mise of three layers ol'the magoetic sheets. the
`composite mayietic body comprises: a first magnetic sheet, a
`second magnetic sheet and a third mayietic sheet from the
`stile ol )lie spital coil.
`ln the present invention. when a relative mayietic
`[0038]
`permeability of the first magnetic sheet constituting thc com-
`posite niayietic body is denoted as pd, a thickness of the hrst
`mayietic sheet is denoted os td (nun), an average relative
`magnetic permeability of the other layers of moyietic sheems
`other than the first magnetic sheet is denoted as pu, and o total
`thickness of tlm other layers ol'magnetic sheet~ is denote»I as
`tu (nuu), the composite magnetic body satisfy the lollou ing
`relations: udtdeg60; ond uu tu==100. The mera e relative
`magnetic penneabihty of the other layers ol'al'ter second)
`magnetic sheets other than the first mayietic sheet is obtauted
`by measuring die rcspectivc relative magnetic pcnncabilitics
`ol'each of the magnetic sheets. mid follov ed by avcragin the
`respective relative magnetic pemieabilities. Further, the total
`thickness is obtained by measuring the respective thicknesses
`ol'each ofthe magnetic sheets. nnd lolloued by totolixing the
`respective thi closes sea. A vo lu e (relative magnetic pemieabil-
`ity of thc magnetic sheetxtlfickness of the magnetic slmct)
`uidicates a mayietic resistance in a magnetic circuit.
`ln thc prcscnt inventiim, the stnicnirc is spccilied so
`[0039]
`that the composite magoetic body sots alias the following rela-
`tions: pd td~60; ond pu tu=-100. Since the first mogvnetic
`slmet isprovidcdtoacloscstpottiontothespirolcoil. the first
`mayietic sheet is liable to affect resonating frequency ot the
`time of charging opemtion. Therefore, when the relation
`ud td~60 is established.
`tfie magnetic resistance can bc
`increased ond the magnetic flux can be prevented from being
`concentrated to the tirst magnetic sheet, so that it beconws
`possible to suppress a loss arisen in the first magnetic sheet
`and to prevent the resonating property from lowering.
`Funhcr, when thc relation putu — 100 is estab-
`[0040]
`lished, the magnetic resistance can be decreased and a shield-
`ing cffcmt is improved, so that an eddy current generati»I at thc
`substrate or the like provided in the devices is suppressed
`thereby to reduce a heat generation. Namely, v, hen only the
`first magnetic sheet is pmvided, the shielding effect is insuf-
`ficient and the beat generation cannot be suppressed. Wlule.
`when only the other (after second) magnetic sheets are pro-
`
`Petitioner Samsung and Google Ex-1010, 0007
`
`

`

`US 20 [1/0210696 Al
`
`Sep. 1, 2011
`
`vided. the resonating property is lowered. For example. v;hen
`only thc magnetic sheets each satisfying tlm relation
`gu te~f00 are formed into a multi-layered structure. the
`shielding propcrty is improved. but the resonating property is
`disadvmitageously lowered. To solve the above problem, the
`present invention adopts o structure in which the first mag-
`netic slmet sat isn'ing thc relation: pd td~ 60 is provided to thc
`side of thc spiral coil
`I'urther. it is prefemble that the stnicture satisfies o
`[0041]
`relation: (pu ni)/(pd td)~10. As described above, the tirst
`magnetic sheet has a main limction of improving the resonat-
`ing property, wlufe the other (afier second) ma netic sheets
`have a main fimction of improving the shielding property.
`W3ten satisfying the relation: (pu tu)/(pd td)==10, functional
`contributions of the first and the other magnetic sheets
`become clear. thereby to iniprove ihe characteristics of the
`po~er receiving apparatus.
`[0042]
`
`In this re ard, an upper limit of the ratio of (iaitu)'pd.td)is not particularly limited, but tlm upper liniit is pref-
`
`erably set to 70 or less I'ivmi if the ratio of (pu tu)/(pd td)
`exceeds 70. the some effect con be obtained However, it is
`nccessmy to cxircmcly enlarge pu or tu, or make pd or td
`extremely small. so that it becomes dificult to manage o
`manufacturing control.
`Further, it is more preferable that the first magnetic
`[0043]
`sheet lms a surface area lar er than that of the other layers of
`the mayietic sheets constiniting the composite mayietic
`body In o case wlmre a plurality of tlm other (after second)
`magnetic sheets are pmvided, the surface area of the other
`magnetic sheets is defined as a largest surface area among the
`respective other magnetic sheets. When the surlace area oHhe
`first magnetic sheet is larger than that ofthe other layers ofthe
`magnetic sheets, it bccomcs possible to prevent thc rcsxmat-
`uig property t'rom loivenng
`I'urther. the insulatuig layer constitunng the com-
`[0044]
`posite magnetic body is not particularly limited. but the insu-
`lating layer may bc Iormcd as on inorganic msulotuig layer. an
`orgamc insulating layer or the like. The insulating layer is
`prefi:rably tiinncd as tbe organic insulating layer using insu-
`lating resin Tire uisulating resin can be used in various fonna
`such as an adhesive agent. a film. rubber or the like. Such
`insulating resin may be provided in accordmice with a size of
`the magnetic sheet.
`Further. the insulaung layer can be also formed by
`[0045]
`combining the insulating film, adhesive agent, nibber or the
`like. One example is an uisulating film with an adhesive
`agent. Furthermore, as exaiuples of the insulaung resin. Tor
`exmuple, notunil rubber. ncopreuc nibber, chloroprene rub-
`ber. silicone rubber. I lypalon; other synthetic rubber, PVC
`resin. ethylene-vinyl acetate copolymer resin, acrylic resin,
`sihcone resin. polyurethane resin. polypmpylene resin. poly-
`ester resui. polyunide resin, polycarbonote resin, polyethyl-
`ene tereph the late resin, po lycthylcne neph the late resin, po ly-
`buthylene napluhalote resui. polyester cltwstomer
`resin,
`fluorine resin, other synthetic resins can be used In a case
`wllcl c flic ilisillilting layer is not provided mxl the first and the
`other nuignetic sheets are directly contacted to face-to-face.
`on effect of shoring roles (functions) cannot be sutTiciently
`'wlieii flic first and thc othiii
`obtaluedi Noluety,
`illagllctlc
`sheets are directly surface-contacted to eacli other, the con-
`tacts'il lilogllctic slicets fulictlilll os elle liiilgllciic slicct
`Furtlmr, the insulating Inyer is sutTicicnt as far as the
`[0046]
`insulating property fiir the respective maguetic sheets is
`mmntained. As to an outemxist layer of the magnetic sheet,
`
`whether the insulating layer is provided or not u ill moke no
`prnble. However, when thc insulating laser is provided to
`the outermost layer of the maytettc sheet. an insulating prop-
`erty against peripheral members (circuit board, secondary
`battery. spiral coil) can be mmntoined, thus being preli:rable.
`One example of the insulating layer is shown in Ffti. 1.
`FICi. 3A shows one Example in vvhich an adhesive
`[0047J
`layer and mi insulating film as the insulating layers are pro-
`vided to one surface of the magnetic sheet, vihile Iilfi. 3B
`shows another 1)xampfe in which the adhesive layer and the
`uisulating tilm as the insulating layers are provided to both
`surfaces ofthe magnetic sheet. In figures, a reference numeml
`5 denotes the insulating film, a reference numeral 6 denotes
`the adhesive layer. and a reference numeral 7 denotes the
`mayietic sheet. When ttu s magnetic sheet and the insulating
`layer are lmuinntnl and the result un lamiuatcxt body is multi-
`layered. thereby to form a composite nm netic body for use in
`an embodiment of the present invention.
`Furtlmr, it is prefi:rable that the insulating layer of
`[0048]
`the compo site magnetic body is composed of resin cont aim ng
`magnetic powder. When the magnetic powder is contained in
`the insulating layer„ thc shielding elTcmt rum bc improvcsf mxi
`the heat genenation cmi be suflicmntly prevented Iix unples
`ofthe magnetic powder include fcrritc pots der, Sendust pow-
`der, amorphous powder or ihc like
`I'unher, in the above composite magneuc body. it is
`[0049]
`preferable that a distance between the first magnetic sheet and
`the other nuignetic sheets is 30 pni or more. Tlm distmice
`benveen the first magnetic sheet and the other mayietic
`sheets is defined as a tlfickness of an insulating layer for
`insulating the first and sn:ond magneuc sheet ~ . Therefore, the
`preferable thichiess of the insulating layer is 30 lun or more.
`[0050J As described hereuibefore, is hen the first and the
`othir magnetic sheets orc directly surface-contacted to each
`other. the contacted magnetic sheets function as one magnetic
`sheet Therefore, it is necessary to prevent thc surface-contact
`ot'be first aml senmd magnetic sheets by interposing the
`insulating layer therebenveen. On the other hand, vs hen the
`thickneos oftlm insulating layer is excessively thin, tlmre may
`be a lair tlmt the insulating effect between tlm two magnetic
`sheets becomes insufticient. Therefore. it is preferable to set
`thc thlcklicss of tile iflslllatilig 1st'I'.l t(1 30 pirl ol fli(ifc.
`In this connection. an upper liniit ol'tlm thickness of
`[0051]
`the insulating layer (i.e.. a distance benveen the first magnetic
`sheet and the other magnetic sheets) is preferably set to 200
`pm or less. When the tlncloiess of the uisulating layer is
`excessively thick. the distance benveen the first mayietic
`sheet ond the other mognenc shcens is excessively apart. so
`that the efi'ect of shanng rolls cannot be sufticiently obtauied.
`hi addition, o total tluckness ofthe composite magnetic body
`becomes excessively large. so that it becomes difTicult
`to
`make the composite mayietic body to be compact in size. In
`this regard. thc total thickness of tlm collip(isitc mogllctic
`body is preferably set to 03 mm or less
`I'urther, the mayietic sheet constituting the ciim-
`[0052]
`posite nmgnetic sheet is not particularly limited as far as the
`magnetic sheet satisfies ihc aforcmcntioncd relative penne-
`abilityxthickness. I lowever, the magnetic sheet may be pref-
`erably fonncd of magnetic materials such as ( o-type amor-
`phous alloy, Te-type amorphous alloy, Fe-npe micm
`crystalline alloy. pemialloy. Each ofthese mayietic materials
`can bc easily prcpnrcd by a ro f 1-sfucnching method (single roll
`method. double role method) or rolluig method. so that it is
`i'asv tii obtain o moyietic sheet (mognetic thin ribbon) having
`
`Petitioner Samsung and Google Ex-1010, 0008
`
`

`

`[jS 20[[/02[0696 Al
`
`Sep. 1, 2011
`
`an average tluclo&ess of 100 pm or less. In addit&onr it is also
`easy to control thc relative permeability of Ihe resultant mag-
`nel&c sheets.
`Furthenm&rc, as the C'o-type amurphous nlloy and
`[0053]
`Ihc Fe-t)3&c mnorphous alloy, it is prelerable to uvv. m& alloy
`having the fi&liow&ng general formula (I).
`
`Genera& ibrmnfa &T, „.M„&rw, X
`lais& one clement selected I'rim& the
`w here&n T denotes at
`group consisting ofCo and Fe, M denotes at least one element
`sclcctcd from the group consisting of Ni, Mn, (.r, Ti. Zr. Hf.
`Mo, xZ Nb. W. Ta, C'u. Ru, Rh, Pd, Os, Ir, P&, Re and Sn, X
`denotes at least one element sale&:ted from the group consist-
`ing of B. Si, ( and P, and a. b satisfy relation formulas
`Otga~03. 10=b=-35 at%. In the above eneral fornn&la (I),
`when both (io and Fe are contained as I'lement and mnount
`of Co is relet&vely lar e„ the alloy &s called as the Co-type
`amorphous alloy. In contrast, when mnount of Fe is relatively
`large, tlm alloy is called as the I'e-type amorphous alloy
`In the above eneral formula (I), T element &s used
`[0054]
`for controll&ng the composit&on ratio in accordance with the
`required magnetic charactenstics such as magnenc ffux den-
`sity, mao octo stnct&on. &ron loss or the hke. Addition amount
`of thc M elcnmnt is prefi.rably set to 0.3 or less as a value
`When the addit&on amount of the M element &s excessively
`large, the amount of T element is relatively reduced, so tl&at
`thc