Source: http://www.google.com/patents/US5174766?dq=5,966,702
Timestamp: 2014-03-17 10:21:32
Document Index: 565721585

Matched Legal Cases: ['art 3', 'art 3', 'art 2', 'art 2', 'art 3', 'arts 2', 'art 2', 'art 3', 'art 2', 'art 2', 'art 3', 'art 3', 'art 2', 'art 2', 'art 3', 'art 3', 'art 2', 'art 2', 'art 2', 'art 2', 'art 3', 'art 2', 'art 2']

Patent US5174766 - Electrical connecting member and electric circuit member - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn electrical connecting member comprising a holder made of electrically insulative material and a plurality of conductive members electrically insulated from each other and embedded in the holder and having ends exposed from the holder, and wherein a conductive adhesive layer eutectoidally formed from...http://www.google.com/patents/US5174766?utm_source=gb-gplus-sharePatent US5174766 - Electrical connecting member and electric circuit memberAdvanced Patent SearchPublication numberUS5174766 APublication typeGrantApplication numberUS 07/810,444Publication dateDec 29, 1992Filing dateDec 19, 1991Priority dateMay 11, 1990Fee statusLapsedPublication number07810444, 810444, US 5174766 A, US 5174766A, US-A-5174766, US5174766 A, US5174766AInventorsSusumu Kadokura, Tetsuo YoshizawaOriginal AssigneeCanon Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (38), Classifications (17), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetElectrical connecting member and electric circuit memberUS 5174766 AAbstract An electrical connecting member comprising a holder made of electrically insulative material and a plurality of conductive members electrically insulated from each other and embedded in the holder and having ends exposed from the holder, and wherein a conductive adhesive layer eutectoidally formed from an adhesive resin solution including one or both of pulverized metal powder and metalized ceramic powder by electrophoresis method is disposed on the end of each conductive member exposed from one surface of the holder. A conductive adhesive layers and the other ends of the conductive members exposed from the other surface of the holder are flush with or protruded from the surfaces of the holder.
Then, the light is illuminated (exposed) on the polyimide resin layer 11a through a photo-mask (not shown) having a predetermined pattern, and then the layer 11a is developed. In this case, the density of energy of the incident light is set to have a value of 100-10,000 mJ/cm.sup.2, and a developing time is 4-30 minutes. In the illustrated embodiment, the polyimide resin 11a remains on the exposed areas, and the polyimide resin 11a is removed from the non-exposed areas to form holes 12 having a diameter of about 10-20 μm. Thereafter, by increasing the temperature, the polyimide resin 11a is cured (see FIG. 4B).
By the way, even when the proper exposure condition and developing condition are set, the residual polyimide resin 11a (not shown) sometimes remains on the surface of the copper plate 10a in the holes 12. In such a case, by utilizing a dry etching process, the copper plate 10a is completely exposed. As the dry etching process, for example, O.sub.2 plasma etching can be adopted, and, in this case, the etching condition will be as follows:
Then, polyester group resin ("FINETEX ES525", registered trade mark, sold by Dai-Nippon Ink Chemical Company, Japan) of 60 wt%, polyester group resin ("FINETEX 525", registered trade mark, sold by Dai-Nippon Ink Chemical Company, Japan) of 40 wt%, bridging agent ("PERMASTAT R-5", registered trade mark, sold by Dai-Nippon Ink Chemical Company, Japan) of 5 wt%, and catalyst ("Cat PA-20, registered trade mark, sold by Dai-Nippon Ink Chemical Company, Japan) of 40 wt% are mixed, and copper powder of 30 wt% including particles having an average diameter of 0.02 μm and powder of 20 wt% including alumina particles having an average diameter of 1 μm and electroplated with nickel with a thickness of 0.2 μm are further mixed to the above mixture. The mixture so obtained is dispersed in a ball mill for 30 minutes, and then is diluted with desalted water to become 15 wt%. Then, the electrodeposition treatment of the diluted solution is effected under a condition of temperature of 25 pH of 8.5, with the substrate as anode and a stainless steel plate as a counterelectrode, by applying the voltage of 100 V for 1-2 minutes, thereby forming bumps 8 on the golden conductive members 4a with protruding from the polyimide resin layer 11a. Thereafter, by heating at a temperature of 50 are formed (see FIG. 4E). Preferably, a thickness of each conductive adhesive layer 14 is normally in the order of 1-100 μm. Lastly, by performing the metal etching process using the etchant so that copper can be removed but the gold 4a and the conductive adhesive layers 14 cannot be removed, the copper plate 10a is removed to obtain the electrical connecting member 1 as shown in FIG. 4F.
As the dry etching process, electronic cyclotron resonance (ERC) plasma etching, or laser etching using the illumination of excimer laser beam may be adopted, other than the above-mentioned O.sub.2 plasma etching. Further, in the above-mentioned embodiment, while the electroplating with gold was effected to form the bumps protruding from the polyimide resin layer 11a in the convex form, such electroplating may be effected to form bumps with not protruding from the surface of the polyimide resin layer in a concave form, or such electroplating may be stopped at a stage where the gold are plated on the copper plate in a half-way in the holes 12. Incidentally, in place of the fact that the gold (conductive members) is filled in the holes 12 and the recesses 13 by means of the gold electroplating, other method, for example, deposition method, may be adopted.
The pulverized metal powder is not limited to the copper, but may be Au, Ag, A(, Be, Ca, Mg, Mo, Fe, Ni, Co, Mn, W, Cr, Nb, Zr, Ti, Ta, Zn, Sn, Pb-Sn and the like. Further, the ceramic powder may be ceramics such as SiO.sub.2, B.sub.2 O.sub.3, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, CaO, ZnO, BaO, PbO, Sb.sub.2 O.sub.3, As.sub.2 O.sub.3, La.sub.2 O.sub.3, ZrO.sub.2, P.sub.2 O.sub.5, TiO.sub.2, MgO, SiC, BeO, BP, BN, AlN, B.sub.4 C, TaC, TiB.sub.2, CrB.sub.2, TiN, Si.sub.3 N.sub.4, Ta.sub.2 O.sub.5, diamond, glass, carbon, boron and the like.
Further, connecting portions 17 of the electric circuit part 3 and the bumps 9 comprised of the conductive adhesive layers 14 of the conductive members 4 exposed toward the electric circuit part 3 are connected to each other by adhering effect to complete the electrical connection (see FIG. 3B). The temperature for connecting the aluminium material of the connecting portion of the electric circuit part 2 to the gold material of the conductive member is preferably in the order of 200 portion of the electric circuit part 2 is gold (Au), such temperature may be 200
On the other hand, the connection between the connecting portions 17 of the electric circuit part 3 and the conductive adhesive layers 14 can be effectively performed at a temperature lower than 180 Incidentally, in the connecting operation, although the positioning of the electric circuit parts 2 and 3 is required, since the pitch between the conductive members 4 of the electrical connecting member 1 is smaller than the pitch between the connecting portions 15 of the electric circuit part 2 and the pitch between the connecting portions 17 of the electric circuit part 3, the electrical connecting member 1 may be roughly positioned.
The connecting portions 15 of the electric circuit part 2 which are not covered by the passivation films 16 and the bumps 8 comprised of the conductive adhesive layers 14 of the conductive members 4 exposed toward the electric circuit part 2 are electrically connected to each other. Further the connecting portions 17 of the electric circuit part 3 and the bumps 9 comprised of the conductive adhesive layers 14 of the conductive members 4 exposed toward the electric circuit part 3 are connected to each other by the adhering effect, thus obtaining the electrical connection (see FIG. 7B). The temperature for connecting the connecting portions 15 of the electric circuit part 2 to the conductive adhesive layers of the conductive members 4 exposed toward the electric circuit part 2, and the temperature for connecting the connecting portions 15 of the electric circuit part 3 to the conductive adhesive layers of the conductive members 4 exposed toward the electric circuit part 3 may be lower than 180 C. to obtain the good connections.
And, the connecting portions 15 of the electric circuit part 2 which are not covered by passivation films 16 and the bumps 8 of the conductive members 4 exposed toward the electric circuit part 2 are connected to each other by metalizing and/or alloying them, and the connecting portions 17 comprised of the conductive adhesive layers 14 formed on metallic electrodes 18 on the circuit board 3a are electrically connected to each other by the adhering effect to obtain the electrical connection (see FIG. 12B). The temperature for connecting the aluminium material of the connecting portion of the electric circuit part 2 to the gold material of the conductive member is preferably in the order of 200 portion of the electric circuit part 2 is gold (Au), such temperature may be 200
On the other hand, the connection between the connecting portions 17 of the conductive adhesive layers 14 of the electric circuit part 3 and the bumps 9 of the conductive members 4 can be effectively performed at a temperature lower than 180 operation, although the positioning of the electric circuit part 2 and the circuit board 3a is required, since the pitch between the conductive members 4 of the electrical connecting member 1 is smaller than the pitch between the connecting portions 15 of the electric circuit part 2 and the pitch between the connecting portions 17 of the circuit board 3b, the electrical connecting member 1 may be roughly positioned.
After a copper foil having a thickness of 18 μm is deoiled by an alcohol solvent, it is further deoiled by alkali cleaner ("Pakuna #19", registered trade mark, sold by Uken Chemical Company, Japan) of 30 g/l at a temperature of 70 washed by water and then is pickled by sulfate liquid of 10% for 30 seconds. Then, the copper foil is further washed by water and then is washed by desalted water, thus completing the surface activation treatment.
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individual components and the circuit board, uses an intermediate carrier between the contact areas of both connection structuresWO1997003482A1 *May 28, 1996Jan 30, 1997Minnesotta Mining And ManufactSeparable electrical connector assembly having a planar array of conductive protrusionsWO2006055155A1 *Oct 19, 2005May 26, 20063M Innovative Properties CoConnector equipped with thermosetting adhesive film and connection method using the same* Cited by examinerClassifications U.S. Classification439/91International ClassificationH05K3/32, H01R12/06, H01R12/04, H01R4/04, H01R13/24Cooperative ClassificationH05K2201/09945, H01R13/2414, H05K2203/135, H05K2201/10378, H01R12/714, H01R4/04, H05K2201/0209, H05K2201/10992, H05K3/321European ClassificationH05K3/32B, H01R23/72BLegal EventsDateCodeEventDescriptionFeb 22, 2005FPExpired due to failure to pay maintenance feeEffective date: 20041229Dec 29, 2004LAPSLapse for failure to pay maintenance feesJul 14, 2004REMIMaintenance fee reminder mailedJun 19, 2000FPAYFee paymentYear of fee payment: 8Apr 23, 1996FPAYFee paymentYear of fee payment: 4Nov 30, 1993CCCertificate of correctionRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google