US4568592A
Expired / Lapsed
US
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Anisotropically electroconductive film adhesive
Assignee: Shin-Etsu Polymer Co Ltd
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Filing: 1985-04-12
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Granted: 1986-02-04
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Expires: 2005-04-12
Abstract
Abstract A film adhesive of a thermoplastic or thermosetting polymeric insulative material can be imparted with anisotropic electroconductivity by dispersing electroconductive fibrils of specified dimensions therein in orientation each lying within a plane substantially parallel to the surface of the film adhesive. The film adhesive is useful in adhesively bonding two circuit boards each having a plurality of electric terminals to be electrically connected each on one circuit board to the oppositely positioned terminal on the other circuit board. The orientation of the fibrils in a plane parallel to the surface of the film adhesive may be either unidirectional or at random.
Inventors
- 👤 Toshiyuki Kawaguchi
- 👤 Hideki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; C; C08; C08K; C08K7/00; C08K7/02; C09; C09J; C09J7/00; C09J7/10; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24; H01R; H01R12/00; H01R12/70; H01R12/71; H01R12/712; H01R12/714; C08K2201/00; C08K2201/016; H01R13/00; H01R13/02; H01R13/22; H01R13/24; H01R13/2407; H01R13/2414; H01R4/00; H01R4/04; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0129; H05K2201/02; H05K2201/0275; H05K2201/0281; H05K3/36; H05K3/361; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24124; Y10T428/249921; Y10T428/249924; Y10T428/249928; Y10T428/26; Y10T428/268; Y10T428/269
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
An anisotropically electroconductive film adhesive structure which comprises (a) a film-like body of a thermally adhesive insulative material as a matrix and (b) electroconductive fibrils disposed in said matrix each having a length of 300 μm or smaller with an aspect ratio of at least 3 and dispersed in the film-like body of said insulative material oriented within a plane substantially parallel to the surface of the film-like insulative mterial, the diameter of the fibrils being equal to or smaller than a half of the thickness of the film-like insulative material and the volume ratio of the fibrils to the film-like body of the matrix being in the range from 2 to 20%.
Claim 2
Dependent Claim
113 words
An anisotropically electroconductive film adhesive structure which comprises (a) a film-like body of a thermally adhesive insulative material as a matrix and (b) electroconductive fibrils disposed in said matrix each having a length of 300 μm or smaller with an aspect ratio of at least 3 and dispersed in the film-like body of said insulative material oriented within a plane substantially parallel to the surface of the film-like insulative mterial, the diameter of the fibrils being equal to or smaller than a half of the thickness of the film-like insulative material and the volume ratio of the fibrils to the film-like body of the matrix being in the range from 2 to 20%.
Claim 3
Dependent Claim
31 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 wherein the electroconductive fibrils are unidirectionally oriented in the matrix of the thermally adhesive insulative material in the film-like form.
Claim 4
Dependent Claim
33 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 wherein the electroconductive fibrils are oriented at random each within a plane substantially parallel to the surface of the film adhesive structure.
Claim 5
Dependent Claim
77 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 having a laminar structure formed of a plurality of layers in each of which the electroconductive fibrils are unidirectionally oriented each within a plane substantially parallel to the surface of the film adhesive structure and the running direction of the electroconductive fibrils in one of the layers makes an angle of at least 30° with the running direction of the electroconductive fibrils in the neighboring layer.
Claim 6
Dependent Claim
19 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 wherein the thermally adhesive insulative material is thermoplastic.
Claim 7
Dependent Claim
19 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 wherein the thermally adhesive insulative material is thermosetting.
Claim 8
Dependent Claim
19 words
The anisotropically electroconductive film adhesive structure as claimed in claim 1 having a thickness of 200 μm or smaller.
Claim 9
Dependent Claim
148 words
An anisotropically electroconductive film adhesive structure comprising a film-like body of the thermally adhesive insulative material defining a matrix and conductive fibrils disposed in said matrix so that they are oriented substantially parallel to the surface of said film-like body, said fibrils being made of carbon type fibers and having a length of 300 μm or smaller with a length to diameter ratio of at least 3, the smaller dimensions of said fibrils being equal to or smaller than about one-half the thickness of said film-like body, the volume ratio of said fibrils to said insulative material defining the matrix being in the range from about 2 to 20%, said insulative material being selected from the group consisting of polyamide resins, nylon resins, saturated polyester resins, butyral resins polymethyl methacrylate resins, polyurethane resins, polycarbonate resins, chloroprene rubbers, thermoplastic resins, chloroprene rubbers, thermoplastic styrene-butadiene rubbers and copolymers of ethylene.
Claim 10
Dependent Claim
148 words
An anisotropically electroconductive film adhesive structure comprising a film-like body of the thermally adhesive insulative material defining a matrix and conductive fibrils disposed in said matrix so that they are oriented substantially parallel to the surface of said film-like body, said fibrils being made of carbon type fibers and having a length of 300 μm or smaller with a length to diameter ratio of at least 3, the smaller dimensions of said fibrils being equal to or smaller than about one-half the thickness of said film-like body, the volume ratio of said fibrils to said insulative material defining the matrix being in the range from about 2 to 20%, said insulative material being selected from the group consisting of polyamide resins, nylon resins, saturated polyester resins, butyral resins polymethyl methacrylate resins, polyurethane resins, polycarbonate resins, chloroprene rubbers, thermoplastic resins, chloroprene rubbers, thermoplastic styrene-butadiene rubbers and copolymers of ethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |