WO2013039227A1 - Dispositif à coefficient de température positif (ptc) - Google Patents

Dispositif à coefficient de température positif (ptc) Download PDF

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Publication number
WO2013039227A1
WO2013039227A1 PCT/JP2012/073709 JP2012073709W WO2013039227A1 WO 2013039227 A1 WO2013039227 A1 WO 2013039227A1 JP 2012073709 W JP2012073709 W JP 2012073709W WO 2013039227 A1 WO2013039227 A1 WO 2013039227A1
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WO
WIPO (PCT)
Prior art keywords
ptc
electrode
layered
cylindrical recess
ptc element
Prior art date
Application number
PCT/JP2012/073709
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English (en)
Japanese (ja)
Inventor
久 薄井
Original Assignee
タイコエレクトロニクスジャパン合同会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by タイコエレクトロニクスジャパン合同会社 filed Critical タイコエレクトロニクスジャパン合同会社
Priority to CN201280055237.9A priority Critical patent/CN103918040B/zh
Priority to KR1020147009423A priority patent/KR101892789B1/ko
Priority to JP2013533742A priority patent/JP6124793B2/ja
Publication of WO2013039227A1 publication Critical patent/WO2013039227A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient

Definitions

  • the present invention relates to a PTC device, and more particularly to a surface mount type PTC device.
  • a PTC device is used in various electrical devices as a circuit protection element, and constitutes a protection circuit for the electrical device.
  • Such a PTC device is arranged on a protection circuit board having a protection circuit.
  • a surface mount type PTC device is often used in consideration of arrangement convenience.
  • the surface mount type PTC device is placed so that its electrode is located on a tab or pad provided on the protection circuit board, and is electrically connected by soldering, thereby forming a protection circuit formed on the protection circuit board. Placed in the circuit.
  • Such a PTC device is schematically shown in a perspective view in FIG.
  • the illustrated PTC device 10 includes a PTC element 11 constituting the PTC device 10.
  • the PTC element 11 includes a PTC element and layered electrodes respectively disposed on the surfaces on both sides thereof, and an insulating layer positioned outside each layered electrode. In FIG. 1, these components are not shown, but are shown as a PTC element 11.
  • the PTC element 11 has semi-cylindrical recess portions 12 and 14 on the side end surfaces at both ends, and a side metal layer portion (for example, a conductive metal plating layer) 16 and the like on the surface of the semi-cylindrical recess portion.
  • the PTC element 11 has end metal layer portions (for example, conductive metal plating layers) 20, 22 and 24, 26 at both ends of the upper surface and the lower surface thereof.
  • the lateral metal layer portions 16 and 18 are integrally connected to the end metal layer portions 20, 22 and 24, 26 at their upper and lower ends, which constitute so-called castellation electrodes (20 + 16 + 22 and 24 + 18 + 26). ing.
  • the castellation electrode has a metal layer portion on both the upper surface and the lower surface of the PTC element 11, but the castellation electrode is generally connected to both ends of the upper surface and the lower surface of the PTC element. There may be a partial metal layer portion (that is, the end metal layer portion may not be provided at the end of the other surface). Therefore, the castellation electrode has end metal layer portions at both ends of at least one of the upper surface and the lower surface of the PTC device.
  • one castellation electrode is electrically connected to one electrode of a PTC element located in the PTC device, and the other castellation electrode is connected to the other of the PTC elements.
  • the electrodes are electrically connected to the electrodes.
  • cream solder is applied onto a pad provided on the substrate by printing, and castellation located on the lower surface of the PTC device is applied to the pad via the applied cream solder portion.
  • the PTC device is disposed so that the end metal layer portion (for example, 22) of the electrode is positioned, and the substrate on which the PTC device is disposed is placed in a reflow furnace to melt and solidify the solder.
  • a state in which the PTC device is mounted on the substrate by soldering in this manner is schematically shown in FIG. 2 in a sectional view.
  • FIG. 2 shows an end view of the PTC device 10 of FIG. 1 mounted on the substrate 28, cut along a vertical plane including the line XX.
  • a solder connection portion 32 is formed by soldering between the pad 30 on the substrate and the end metal layer portion 22 of the castellation electrode, and these are joined together and electrically connected. Solder melted in the reflow furnace also wets over the semi-cylindrical concave portion, solidifies as it is, and a solder portion 34 is also present as a fillet portion on the side metal layer portion 16 of the castellation electrode, which is a solder connection portion. 32 is integrated.
  • the problem to be solved by the present invention is to reduce as much as possible the possibility of such an electrical connection being defective.
  • the inventor has intensively studied about the suppression of stress concentration, and as a result, places where stress may concentrate are not provided in two places on both sides of the PTC device, It has been thought that by using the corner portions of the PTC device, that is, by providing them at four locations, the possibility of poor electrical connection is reduced.
  • the present invention provides a PTC device,
  • This PTC device A PTC unit comprising a layered PTC element and a first layered electrode and a second layered electrode respectively disposed on the surfaces of the layered PTC element, and an insulation located outside each layered electrode (ie outside the PTC unit) Comprising a (layered) PTC element having a layer,
  • the PTC element has a first end and a second end, the first end has a first quarter cylindrical recess at each corner, and the second end Having a second quarter cylindrical recess in the corner,
  • Each first quarter cylindrical recess has a first castellation electrode electrically connected to the first layered electrode, and each second quarter cylindrical recess is connected to the second layered electrode It has the 2nd castellation electrode.
  • the PTC device further includes the previously described semi-cylindrical recesses at the first end and the second end in addition to the first quarter-cylindrical recess and the second quadrant-cylindrical recess. You can do it.
  • a plurality of PTC units each including a PTC element and layered electrodes disposed on the surfaces on both sides thereof are laminated via an insulating layer. Also good.
  • the present invention provides another PTC device,
  • This PTC device A plurality of PTC units having a plurality of layered PTC elements, a plurality of PTC units each having a first layered electrode and a second layered electrode disposed on both sides of each PTC element, and the PTC units being spaced apart And having a PTC element as a laminate in which insulating layers arranged between PTC units are laminated,
  • the PTC element has a first end and a second end,
  • the PTC element has a first quarter cylindrical recess at each corner portion at the first end and a second quarter cylindrical recess at the corner portion at the second end.
  • Each first quarter cylindrical recess has a first castellation electrode electrically connected to the first layered electrode of each PTC element
  • each second quarter cylindrical recess has a second layered electrode And a second castellation electrode connected to the first electrode.
  • the PTC device includes the semi-cylinder described above at the first end and the second end of the PTC element stack in addition to the first quarter cylindrical recess and the second quarter cylindrical recess. You may further have a shape-like recessed part.
  • the corner portion of the PTC element or the PTC element laminate has a quarter-cylindrical concave portion, and the castellation electrode is arranged in that portion. Since there are at least four locations where concentration is likely to occur, as a result, the total amount of stress acting on each castellation electrode can be reduced, so that the solder connection portion that functions for electrical connection with the PTC device It is possible to reduce as much as possible the possibility of poor electrical connection.
  • FIG. 1 schematically shows a perspective view of a conventional PTC device.
  • FIG. 2 schematically shows a state in which a conventional PTC device is mounted on a substrate.
  • FIG. 3 schematically shows a plan view of the PTC device of the present invention.
  • FIG. 4 schematically shows a plan view of another embodiment of the PTC device of the present invention.
  • FIG. 5 schematically shows a cross section (along line YY in FIG. 4) of a PTC device of the present invention having a single PTC unit.
  • FIG. 6 schematically shows a cross section (along line YY in FIG. 4) of a PTC device of the present invention having a plurality of PTC units.
  • FIG. 7 schematically shows a perspective view of the PTC device of the present invention shown in FIG.
  • FIG. 8 schematically shows a plan view of the pressure-bonded body in order to explain the method for producing the PTC device of the present invention.
  • the PTC device 10 When mounting the PTC device of the present invention on a substrate, a plan view of the case where the PTC device is placed so that the surface facing the substrate faces upward (corresponding to the case viewed in the direction of arrow A in FIG. 1) is shown. 3 and a perspective view are schematically shown in FIG. Accordingly, the lower surface 38 of the PTC device of FIGS. 1 and 2 becomes the upper surface 38 in FIGS.
  • the PTC device 10 includes a PTC element 11, and the PTC element includes a first end 42 and a second end 44.
  • the PTC element includes a first quarter cylindrical recess (see FIG. 3) 36 or a first quarter cylindrical recess (see FIG. 7), and a second quarter cylindrical recess (see FIG. 3) 37 or second.
  • a quarter-cylindrical recess (see FIG. 7) 37 is cut out as a whole (ie, when there is no cut-out portion), and has a rectangular shape in the plan view of FIG. 3, and a rectangular parallelepiped in the perspective view of FIG. Has a shape.
  • the quarter-circular portions (or quarter-cylindrical concave portions) 36 and 37 are derived from the fact that the PTC element 10 constituting the PTC device has the quarter-cylindrical concave portions as notches at four corner portions.
  • the PTC element 11 has two first quarter cylindrical portions 36 at the first end portion 42 and two first quarter cylindrical portions 37 at the second end portion 44. .
  • the quarter-cylindrical recess 36 has a quarter shape of the cylinder (thus, in FIG. 3, a quarter-circle shape).
  • the PTC element 11 may have another cutout shape instead of the quadrant shape as long as the four corner portions are cut out.
  • the cutout shape may be a right triangle shape or a quarter ellipse shape.
  • the illustrated PTC device 10 has a side metal layer portion 16 on a side surface 40 defining each first quarter cylindrical recess 36 of the PTC element 11, and one end portion of the side surface (the embodiment shown in FIG. 7).
  • the upper end 46) has the end metal plating layer portion 22, and these metal layer portions are integrally connected to form the first castellation electrode 50.
  • the PTC device 10 has a side metal layer portion 17 on a side surface 41 that defines each second quarter cylindrical recess 37 of the PTC element 11, and one end portion of the side surface (the mode shown in FIG. 7). Then, the upper end 47) has the end metal layer portion 23, and these metal layer portions are connected together to form the second castellation electrode 52.
  • the lateral metal layer of the castellation electrode extends over the entire side surface defining the recess, and the end metal layer portions 22 and / or 23 may be annular as shown in FIG. In an aspect, as shown in FIG. 4, it may be rectangular (however, it has a notch corresponding to a quarter circle).
  • the side surface 40 and / or the side surface 41 has the end metal layer portion 20 (in FIG. 7, for example, the front side is indicated by a broken line at the other end (lower end 48 in the embodiment shown in FIG. 7).
  • These three metal layer portions ie, the end metal layer portion 22 or 23 on one end 46, the side metal layer portion 16 or 17 on the side, and the other end).
  • the end metal layer portion 20) on the portion 48 may constitute first and / or second castellation electrodes.
  • the first castellation electrode 50 is electrically connected to a first layered electrode disposed on the main surface of one or more PTC elements constituting the PTC element
  • the second castellation The electrode 52 is electrically connected to a second layered electrode disposed on the main surface of one or more PTC elements constituting the PTC element.
  • the entire castellation electrode may be formed by plating with a conductive metal.
  • the castellation electrode can be formed by masking the portion other than the portion where the castellation electrode is to be formed, plating a conductive metal (eg, copper, nickel, tin, etc.), and then removing the masking.
  • a conductive metal eg, copper, nickel, tin, etc.
  • each of the side metal layer portion and the end metal layer portion is constituted by a plating layer.
  • the end metal layer portion may be a metal foil and a plating layer formed thereon.
  • a plating process is performed.
  • the side metal layer portion is constituted by a plating layer.
  • the metal having excellent corrosion resistance is formed on the outermost layer of the castellation electrode formed by the plated layer or the castellation electrode formed by the metal foil and the plated layer formed thereon as described above.
  • the layer may be further formed by a plating process.
  • the outermost layer is made of copper, it is preferable to overlay a nickel and then tin plating layer or a nickel and then gold plating layer thereon.
  • FIG. 5 schematically shows a cross section that appears when the PTC device of the present invention is cut along line YY in FIG.
  • the illustrated PTC element 10 includes a PTC unit 60 having a layered PTC element 54 and a first layered electrode 56 and a second layered electrode 58 disposed on the surfaces of the layered PTC element 54, and outside the layered electrodes (
  • the PTC element 66 is formed as a whole having the first insulating layer 62 and the second insulating layer 64 positioned outside the PTC unit.
  • the PTC element 66 has a first end portion 42 and a second end portion. At the first end portion, the PTC element 66 has a first quarter cylindrical recess 36 at each corner portion thereof, and at the second end portion. In addition, a second quarter cylindrical recess 37 is provided at the corner.
  • a PTC unit having a layered PTC element, a layered electrode (usually a metal foil) located on both sides of the layered PTC element, and an insulating layer is a well-known member, and is described in detail, for example, in the above-mentioned patent document. Is omitted.
  • a first castellation electrode 50 electrically connected to the first layered electrode 56 at its end 68 is formed on the side surface 40 defining the first quarter cylindrical recess
  • a second castellation electrode 52 electrically connected to the second layered electrode 58 at its end 70 is formed on the side surface 41 that defines each second quadrant cylindrical recess 37.
  • each castellation electrode is located at each end of the side metal layer portion 72 (corresponding to 16 or 18 in FIG. 1) and the top and bottom surfaces of the PTC element 66, respectively.
  • Such a metal layer portion is preferably a metal plating layer from the viewpoint of efficient production as described later.
  • FIG. 6 schematically shows a cross section that appears when a PTC device according to another aspect of the present invention is cut in the same manner as in FIG.
  • a PTC device according to another aspect of the present invention is cut in the same manner as in FIG.
  • it has two layered PTC elements 78 and 80, and a first layered electrode 82 and 84 and a second layered electrode 86 and 88 respectively disposed on the surfaces on both sides of each PTC element.
  • two PTC units 90 and 92 are sandwiched between insulating layers 94, 96 and 98 so that the insulating layers are located on both sides of the PTC units, and are disposed between them.
  • These insulating layers and the PTC units disposed therebetween are laminated to form a PTC element as a laminate.
  • the PTC element has a first end 42 and a second end 44 at the first quarter cylindrical portion 36 and the second quarter cylindrical portion. 37, and a first castellation electrode 50 and a second castellation electrode 52 are formed on the side surface defining these.
  • the first layered electrodes 82 and 84 are electrically connected to the first castellation electrode 50 at their ends, and the second layered electrodes 86 and 88 are electrically connected to the second castellation electrode 52. Connected.
  • each PTC unit is laminated, but more PTC units may be laminated so that the PTC units are sandwiched between insulating layers.
  • one layered electrode of each PTC unit is connected to the first castellation electrode, and the other layered electrode is connected to the second castellation electrode, whereby the PTC units are connected in parallel.
  • the device can be configured.
  • the PTC device of the present invention can be manufactured as follows. First, a main layer on both sides of a polymer PTC sheet obtained by extruding a polymer PTC composition is pressure-bonded to a metal layer (for example, a metal foil) constituting a layered electrode, or a polymer PTC composition And a metal layer are coextruded to obtain a laminate in which the PTC sheet is sandwiched between the metal layers. Next, the obtained laminate is subjected to an etching process to remove a part of the metal layer (a part corresponding to the part 100 in FIG. 5 or FIG. 6), and then an insulating layer is formed on both sides. Insulating resin sheets (for example, prepreg sheets) are stacked, and conductive metal foils (for example, copper foils) are stacked on the outside as necessary, and these are integrally pressed to obtain a pressed body.
  • a metal layer for example, a metal foil constituting a layered electrode, or a polymer PTC composition
  • a metal layer
  • FIG. 8 drilling is performed so that a cylindrical hole is formed at a predetermined position of the crimping body. Then, the entire punched crimped body is subjected to copper plating in a lump, and thereafter, only the portions corresponding to the end metal layer portions on the upper surface and the lower surface and the cylindrical recess formed by drilling are masked. Etch the metal part. Thereafter, the masking is removed, and four portions 22 or 23 corresponding to the end metal layer portions on the upper surface and the lower surface (rectangles obtained by cutting out the 90 ° fan-shaped portion 104) are defined and defined. Two larger rectangular plating layers 106 and plating layers on the sides of the cylindrical recess formed by drilling are formed. FIG.
  • FIG. 8 is a schematic plan view showing the crimp body 102 formed as described above.
  • the part corresponding to the edge part metal layer part 22 or 23 of the upper surface and lower surface formed in this way is comprised by copper foil and the copper plating layer formed on it, for example, FIG. In FIG. 6 and FIG. 7, these are shown as an integrated object.
  • the pressure-bonded body 102 may be subjected to a metal plating process (for example, a nickel or tin plating process) as necessary.
  • a metal plating process for example, a nickel or tin plating process
  • the thickness portion of the layered metal disposed on the PTC element is exposed on the side surface portion of the cylindrical recess, and such side surface portion is plated so that the castellation electrode is formed on the side surface. Since the side metal plating layer is formed, the end portion of the layer metal is electrically connected to the side metal plating layer.
  • the individual PTC devices 10 of the present invention can be obtained by cutting the pressure-bonded body 102 thus plated, along the dividing line 110 in the vertical direction and the dividing line 112 in the horizontal direction.
  • a PTC device can be efficiently manufactured by forming the press-bonded body in a state where the PTC devices are adjacent to each other in the vertical and horizontal directions, and then dividing them.
  • a method of manufacturing a PTC device having a structure in which an electrode is electrically connected to a castellation electrode is basically known, and can be referred to, for example, Patent Document 1 described above.
  • the PTC device of the present invention is particularly effective when the PTC element is hard. That is, when the conductive polymer composition constituting the PTC element includes a relatively hard polymer, for example, when it includes polyvinylidene fluoride resin (PVDF), compared to a softer resin (for example, polyethylene), PTC Since it is difficult to relieve the stress generated by the expansion / contraction of the element, it is effective to provide a quarter cylindrical recess in the PTC device and form a castellation electrode there.
  • PVDF polyvinylidene fluoride resin
  • a softer resin for example, polyethylene

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

La présente invention se rapporte à un dispositif à coefficient de température positif (PTC, Positive Temperature Coefficient) qui réduit autant que possible le risque qu'une connexion électrique d'une connexion soudée formée pour être connectée à un substrat ne soit défectueuse. Le dispositif à coefficient PTC comprend un élément à coefficient PTC qui comporte : une unité à coefficient PTC qui comprend un composant stratifié à coefficient PTC et une première électrode stratifiée ainsi qu'une seconde électrode stratifiée qui sont chacune positionnées sur une surface sur l'un ou l'autre côté du composant stratifié à coefficient PTC ; ainsi que des couches isolantes positionnées sur la partie extérieure de chaque électrode stratifiée. L'élément à coefficient PTC présente une première extrémité et une seconde extrémité et, au niveau de la première extrémité, présente un premier quart d'évidement cylindrique dans chaque coin et, au niveau de la seconde extrémité, présente des seconds quarts d'évidement cylindrique dans les coins. Chaque premier quart d'évidement cylindrique comprend une première électrode ajourée qui est électriquement raccordée à la première électrode stratifiée, et chaque second quart d'évidement cylindrique comprend une seconde électrode ajourée qui est électriquement raccordée à la seconde électrode stratifiée.
PCT/JP2012/073709 2011-09-15 2012-09-14 Dispositif à coefficient de température positif (ptc) WO2013039227A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201280055237.9A CN103918040B (zh) 2011-09-15 2012-09-14 Ptc装置
KR1020147009423A KR101892789B1 (ko) 2011-09-15 2012-09-14 Ptc 디바이스
JP2013533742A JP6124793B2 (ja) 2011-09-15 2012-09-14 Ｐｔｃデバイス

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-201663 2011-09-15
JP2011201663 2011-09-15

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WO2013039227A1 true WO2013039227A1 (fr) 2013-03-21

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KR (1) KR101892789B1 (fr)
CN (1) CN103918040B (fr)
WO (1) WO2013039227A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
JP2015142058A (ja) * 2014-01-30 2015-08-03 京セラ株式会社 熱電モジュール
EP3942576A4 (fr) * 2019-03-22 2022-04-13 Littelfuse Electronics (Shanghai) Co., Ltd. Dispositif ptc comprenant un polycommutateur

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CN104851540A (zh) * 2014-02-18 2015-08-19 富致科技股份有限公司 Pptc过电流保护装置
CN104733144B (zh) * 2015-02-06 2017-09-19 上海长园维安电子线路保护有限公司 表面贴装型电路保护元件及制造方法
CN104733266B (zh) * 2015-02-15 2017-10-27 上海长园维安电子线路保护有限公司 一种表面贴装型电路保护元件及制造方法
CN109727736A (zh) * 2017-10-27 2019-05-07 上海神沃电子有限公司 电路保护元件
JP7203234B2 (ja) 2019-08-30 2023-01-12 京セラ株式会社 電磁場制御用部材
JP7508398B2 (ja) 2021-03-26 2024-07-01 京セラ株式会社 絶縁継手、真空容器および粒子加速器

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JPH05175088A (ja) * 1991-12-24 1993-07-13 Tdk Corp 複合チップ素子及びその製造方法
JPH11162708A (ja) * 1997-09-03 1999-06-18 Bourns Multifuse Hong Kong Ltd 多層導電性ポリマ正温度係数デバイス
JP3073003U (ja) * 1999-04-26 2000-11-14 聚鼎科技股▲ふん▼有限公司 表面実装型電気装置
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015142058A (ja) * 2014-01-30 2015-08-03 京セラ株式会社 熱電モジュール
EP3942576A4 (fr) * 2019-03-22 2022-04-13 Littelfuse Electronics (Shanghai) Co., Ltd. Dispositif ptc comprenant un polycommutateur
US11854723B2 (en) 2019-03-22 2023-12-26 Littelfuse Electronics (Shanghai) Co., Ltd. PTC device including polyswitch

Also Published As

Publication number Publication date
CN103918040A (zh) 2014-07-09
JPWO2013039227A1 (ja) 2015-03-26
KR20140067107A (ko) 2014-06-03
CN103918040B (zh) 2018-06-29
JP6124793B2 (ja) 2017-05-10
KR101892789B1 (ko) 2018-08-28

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