EP0147856A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrically conductive adhesive sheet
Assignee: Sony Corp
•
Filing: 1984-12-27
•
Granted: —
•
Expires: 2004-12-27
Abstract
Abstract An electrically conductive adhesive sheet (11) is disclosed which has an electrically conducting property across a thickness thereof and an electrically insulating property along a sheet surface direction. The electrically conductive adhesive sheet (11) comprises an electrically insulating adhesive material (12) and electrically conductive metal powder (13) uniformly dispersed therein. The metal powder (13) has a melting point lower than a certain working temperature, and is flattened by application of pressure between a pair of conductors (6. 7) between which the adhesive sheet (11) is provided. The adhesive material (12) is molten at the certain working temperature and is flown by application of pressure. The adhesive sheet (11) is useful to electrically connect a pair of circuit boards each having a plurality of conductor patterns thereon by bonding corresponding ones through the metal powder (13) as molten, while keeping the neighbouring patterns insulated. The circuit board is mechanically integrated simultaneously by the adhesive sheet (11). The circuit board and the connection structure using such an adhesive sheet as above are also disclosed.
Inventors
- 👤 Yoshio C/O Sony Chemicals Corporation Fujiwara
- 👤 Hisashi C/O Sony Chemicals Corporation Ando
- 👤 Naotake C/O Sony Chemicals Corporation Kobayashi
- 👤 Hiderhiro C/O Sony Chemicals Corporation Numao
- 👤 Yuichi C/O Sony Chemicals Corporation Matsubara
- 👤 Kazuaki C/O Sony Chemicals Corproration Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; H01; H01R; H01R4/00; H01R4/04; H01R12/00; H01R12/50; H01R12/51; H01R12/52; H01R12/59; H01R12/62; H05K1/00; H05K1/18; H05K1/181; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0129; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K2201/10719; H05K2201/10954; H05K2201/10977; H05K2203/00; H05K2203/04; H05K2203/0425; H05K2203/13; H05K2203/1305; H05K2203/1311; H05K3/36; H05K3/361; H10; H10W; H10W72/00; H10W72/071; H10W72/072; H10W72/07251; H10W72/073; H10W72/20; H10W72/30; H10W72/321; H10W72/325; H10W72/351; H10W72/352; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/25; Y10T428/256; Y10T428/28; Y10T428/2852; Y10T428/2857
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
102 words
An electrically conductive adhesive sheet having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surfacethereof comprising: an adhesive sheet (11, 25) containing a uniform dispersion of electrically conductive metal powder (13, 24) electrically insulated from each other by an electrically insulating adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a predetermined working temperature and being able to be flattened by a predetermined working pressure, said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure.
Claim 2
Dependent Claim
102 words
An electrically conductive adhesive sheet having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surfacethereof comprising: an adhesive sheet (11, 25) containing a uniform dispersion of electrically conductive metal powder (13, 24) electrically insulated from each other by an electrically insulating adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a predetermined working temperature and being able to be flattened by a predetermined working pressure, said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure.
Claim 3
Dependent Claim
245 words
An electrically conductive adhesive sheet having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, for electrically connecting a first set of a plurality of electrically conductive tracks (6, 22) with a second set of a plurality of electrically conductive tracks __ (7, 28) to be connected with each of said electrically conductive tracks of said first set (6, 22), and mechanically integrating said first and said second set of a plurality of electrically conductive tracks (6, 7, 22, 28) comprising: an adhesive sheet (11, 25) containing a uniform dispersion of electrically conductive metal powder (13, 24) in an electrically insulating adhesive material (12, 23), each of said metal powder (13, 24) being electrically insulated by said adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a certain elevated working temperature and being able to be flattened by a certain working pressure applied between said first and second set of conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure, said metal powder (13, 24) having a particle size small enough not to bridge any neighbouring pair of said conductive tracks (6, 7, 22, 28) when flattend by application of said working pressure, said metal powder (13, 24) and said adhesive material (12, 23) being solidified after cooled to room temperature.
Claim 4
Dependent Claim
245 words
An electrically conductive adhesive sheet having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, for electrically connecting a first set of a plurality of electrically conductive tracks (6, 22) with a second set of a plurality of electrically conductive tracks __ (7, 28) to be connected with each of said electrically conductive tracks of said first set (6, 22), and mechanically integrating said first and said second set of a plurality of electrically conductive tracks (6, 7, 22, 28) comprising: an adhesive sheet (11, 25) containing a uniform dispersion of electrically conductive metal powder (13, 24) in an electrically insulating adhesive material (12, 23), each of said metal powder (13, 24) being electrically insulated by said adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a certain elevated working temperature and being able to be flattened by a certain working pressure applied between said first and second set of conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure, said metal powder (13, 24) having a particle size small enough not to bridge any neighbouring pair of said conductive tracks (6, 7, 22, 28) when flattend by application of said working pressure, said metal powder (13, 24) and said adhesive material (12, 23) being solidified after cooled to room temperature.
Claim 5
Dependent Claim
25 words
The electrically conductive adhesive sheet according to claim 1 or 2, wherein said metal powder (13, 24) has a melting point between 50°C and 350°C.
Claim 6
Dependent Claim
28 words
The electrically conductive adhesive sheet according to any one of-claims 1 to - 3, wherein said metal powder (13, 24) has a melting point between 80°C and 260°C.
Claim 7
Dependent Claim
34 words
The electrically conductive adhesive sheet according to any one of claims 1 to 4, wherein said metal powder (13, 24) has an insulating layer on a surface of each said metal powder (13, 24).
Claim 8
Dependent Claim
30 words
The electrically conductive adhesive sheet according to any one of claims 1 to 5, wherein said metal powder (13, 24) is made of an alloy mainly containing Pb and Sn.
Claim 9
Dependent Claim
34 words
The electrically conductive adhesive sheet according to any one of claims 1 to 6, wherein said metal powder (13, 24) is solderable to a transparent conductive electrode made of oxides of indium and tin.
Claim 10
Dependent Claim
43 words
The electrically conductive adhesive sheet according to any one of claims 1 to 7, wherein said metal powder (13, 24) is made of an alloy containing Pb and Sn and an additive selected from the group consisting of Zn and rare earth elements.
Claim 11
Dependent Claim
29 words
The electrically conductive adhesive sheet according to any one of claims 1 to 8, wherein said adhesive sheet (11, 25) has a thickness between 5 microns and 200 microns.
Claim 12
Dependent Claim
46 words
The electrically conductive adhesive sheet according to any one of claims 1 to 9, wherein said adhesive sheet (11, 25) contains 0.5 to 50 parts by volume of said metal powder (13, 24) with respect to 100 parts by volume of said adhesive material (12, 23).
Claim 13
Dependent Claim
33 words
The electrically conductive adhesive sheet according to any of claims 1 to 10, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.001 at said elevated working temperature.
Claim 14
Dependent Claim
34 words
The electrically conductive adhesive sheet according to any one of claims 1 to 11, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.005 at said elevated working temperature.
Claim 15
Dependent Claim
25 words
The electrically conductive adhesive sheet according to claim 1 or 2, wherein said adhesive material (12, 23) has resistivity not less than 10 ohm cm.
Claim 16
Dependent Claim
327 words
A circuit voard comprising: an insulating substrate (8, 21); a first set of a plurality of electrically conductive tracks (6, 22) formed on said substrate (8, 21); and an electrically conductive adhesive sheet ( 1 2, 23) provided on said conductive tracks (6, 22) at least over an area where a second set of a plurality of electrically conductive tracks (7, 28) are to be electrically connected to said first set of conductive tracks (6, 22), said electrically conductive adhesive sheet (12, 23) having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, for electrically connecting said first set of a plurality of electrically conductive tracks (6, 22) with said second set of a plurality of electrically conductive tracks (7, 28) to be connected with each of said electrically conductive tracks (6, 22) of said first set, and for mechanically integrating said first and said second set of a plurality of electrically conductive tracks (6, 7, 22, 28), said adhesive sheet (11, 25) comprising an adhesive sheet containing a uniform dispersion of electrically conductive metal powder (13, 24) in an electrically insulating adhesive material (12, 23), each of said metal powder (13, 24) being electrically insulated by said adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a certain elevated working temperature and being able to be flattened by a certain working pressure applied between said first and said second set of conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure, said metal powder (13, 24) having a particle size small enough not to bridge any neighbouring pair of said conductive tracks (6, 7, 22, 28) when flattened by application of said working pressure, said metal powder (13, 24) and said adhesive material (12, 23) being solidified after cooled to room temperature.
Claim 17
Dependent Claim
327 words
A circuit voard comprising: an insulating substrate (8, 21); a first set of a plurality of electrically conductive tracks (6, 22) formed on said substrate (8, 21); and an electrically conductive adhesive sheet ( 1 2, 23) provided on said conductive tracks (6, 22) at least over an area where a second set of a plurality of electrically conductive tracks (7, 28) are to be electrically connected to said first set of conductive tracks (6, 22), said electrically conductive adhesive sheet (12, 23) having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, for electrically connecting said first set of a plurality of electrically conductive tracks (6, 22) with said second set of a plurality of electrically conductive tracks (7, 28) to be connected with each of said electrically conductive tracks (6, 22) of said first set, and for mechanically integrating said first and said second set of a plurality of electrically conductive tracks (6, 7, 22, 28), said adhesive sheet (11, 25) comprising an adhesive sheet containing a uniform dispersion of electrically conductive metal powder (13, 24) in an electrically insulating adhesive material (12, 23), each of said metal powder (13, 24) being electrically insulated by said adhesive material (12, 23), said metal powder (13, 24) having a melting point lower than a certain elevated working temperature and being able to be flattened by a certain working pressure applied between said first and said second set of conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being able to be molten and flown at said working temperature and under said working pressure, said metal powder (13, 24) having a particle size small enough not to bridge any neighbouring pair of said conductive tracks (6, 7, 22, 28) when flattened by application of said working pressure, said metal powder (13, 24) and said adhesive material (12, 23) being solidified after cooled to room temperature.
Claim 18
Dependent Claim
21 words
The circuit board according to claim 14, wherein said metal powder (13, 24) has a melting point- between 50°C and 350°C.
Claim 19
Dependent Claim
21 words
The circuit board according to claim 14, wherein said metal powder (13, 24) has a melting point between 80°C and 260°C.
Claim 20
Dependent Claim
32 words
The circuit board according to any one of claims 14 to 16, wherein said metal powder (13, 24) has an insulating layer on a surface of each said metal powder (13, 24).
Claim 21
Dependent Claim
28 words
The circuit board according to any one of claims 14 to 17, wherein said metal powder (13, 24) is made of an alloy mainly containing Pb and Sn.
Claim 22
Dependent Claim
32 words
The circuit board according to any one of claims 14 to 18, wherein said metal powder (13, 24) is solderable to a transparent conductive electrode made of oxides of indium and tin.
Claim 23
Dependent Claim
41 words
The circuit board according to any one of claims 14 to 19, wherein said metal powder (13, 24) is made of an alloy containing Pb and Sn and an additive selected from the group consisting of Zn and rare earth elements.
Claim 24
Dependent Claim
27 words
The circuit board according to any one of claims 14 to 20, wherein said adhesive sheet (11, 25) has a thickness between 5 microns and 200 microns.
Claim 25
Dependent Claim
44 words
The circuit board according to any one of claims 14 to 21, wherein said adhesive sheet (11, 25) contains 0.5 to 50 parts by volume of said metal powder (13, 24) with respect to 100 parts by volume of said adhesive material (12, 23).
Claim 26
Dependent Claim
32 words
The circuit board according to any one of claims 14 to 22, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.001 at said elevated working temperature.
Claim 27
Dependent Claim
34 words
24 . The circuit board according to any one of claims 14 to 22, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.005 at said elevated working temperature.
Claim 28
Dependent Claim
26 words
The circuit board according to any one of claims 14 to 24, wherein said adhesive material (12, 23) has resistivity not less than 10 ohm cm.
Claim 29
Dependent Claim
21 words
The circuit board according to any one of claims 14 - 25, wherein said substrate (8, 21) is made of glass.
Claim 30
Dependent Claim
35 words
The circuit board according to any one of claims 14 to 26, wherein said adhesive sheet (11, 25) is coated over said first set of electrically conductive tracks (6, 22) and said substrate (8, 21).
Claim 31
Dependent Claim
219 words
An electrical connection structure comprising: a first set of a plurality of electrically conductive tracks (6, 22) formed on a substrate (8, 21); a second set of a plurality of conductive tracks (7, 28); and and an electrically conductive adhesive sheet (11, 25) having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, said adhesive sheet (11, 25) comprising an adhesive sheet containing a uniform dispersion of electrically conductive metal powder (13, 24) electrically insulated from each other by an electrically insulating adhesive material (12, 23), said metal powder (13, 24) being molten and flattened, and electrically connecting each of said conductive tracks (6, 22) of said first set with each of said conductive tracks (7, 28) of said second set under a surface-contact condition upon application of a certain elevated working temperature higher than a melting point of said metal powder (13, 24) and a certain working pressure applied between said first and said second set of said conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being molten, flown and partly expelled between said first and said second set of said conductive tracks (6, 7, 22, 28) to mechanically integrate said first and said second set of said conductive tracks (6, 7, 22, 28)'.
Claim 32
Dependent Claim
219 words
An electrical connection structure comprising: a first set of a plurality of electrically conductive tracks (6, 22) formed on a substrate (8, 21); a second set of a plurality of conductive tracks (7, 28); and and an electrically conductive adhesive sheet (11, 25) having an electrically conducting property across a thickness thereof and an electrically insulating property along a direction of a surface thereof, said adhesive sheet (11, 25) comprising an adhesive sheet containing a uniform dispersion of electrically conductive metal powder (13, 24) electrically insulated from each other by an electrically insulating adhesive material (12, 23), said metal powder (13, 24) being molten and flattened, and electrically connecting each of said conductive tracks (6, 22) of said first set with each of said conductive tracks (7, 28) of said second set under a surface-contact condition upon application of a certain elevated working temperature higher than a melting point of said metal powder (13, 24) and a certain working pressure applied between said first and said second set of said conductive tracks (6, 7, 22, 28), said adhesive material (12, 23) being molten, flown and partly expelled between said first and said second set of said conductive tracks (6, 7, 22, 28) to mechanically integrate said first and said second set of said conductive tracks (6, 7, 22, 28)'.
Claim 33
Dependent Claim
22 words
The electrical connection structure according to claim 28, wherein said metal powder (13, 24) has a melting point between 50°C and 350°C.
Claim 34
Dependent Claim
22 words
The electrical connection structure according to claim 28, wherein said metal powder (13, 24) has a melting point between 80°C and 260°C.
Claim 35
Dependent Claim
33 words
The electrical connection structure according to any one of claims 28 to 30, wherein said metal powder (13, 24) has an insulating layer on a surface of each said metal powder (13, 24).
Claim 36
Dependent Claim
29 words
The electrical connection structure according to any one of claims 28 to 31, wherein said metal powder (13, 24) is made of an alloy mainly containing Pb and Sn.
Claim 37
Dependent Claim
33 words
The electrical connection structure according to any one of claims 28 to 32, wherein said metal powder (13, 24) is solderable to a transparent conductive electrode made of oxides of indium and tin.
Claim 38
Dependent Claim
42 words
The electrical connection structure according to any one of claims 28 to 35, wherein said metal powder (13, 24) is made of an alloy containing Pb and Sn and an additive selected from the group consisting of Zn and rare earth elements.
Claim 39
Dependent Claim
28 words
The electrical connection structure according to any one of claims 28 to 34, wherein said adhesive sheet (11, 25) has a thickness between 5 microns and 200 microns.
Claim 40
Dependent Claim
44 words
The electrical connection structure according to any one of claims 28 to 35 , wherein said adhesive sheet (11, 25) contains 0.5 to 50 parts by volume of said metal powder (13, 24) with respect to 100 parts by volume of said adhesive material(12,23).
Claim 41
Dependent Claim
33 words
The electrical connection structure according to any one of claims 28 to 36, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.001 at said elevated working temperature.
Claim 42
Dependent Claim
33 words
The electrical connection structure according to any one of claims 30 to 37, wherein said adhesive material (12, 23) has a melt flow index not smaller than 0.005 at said elevated working temperature.
Claim 43
Dependent Claim
27 words
The electrical connection structure according to any one of claims 28 to 38, wherein said adhesive material (12, 23) has resistivity not less than 10 ohm cm.
Claim 44
Dependent Claim
35 words
The electrical connection structure according to any one of claims 28 to 39, wherein said second set of a plurality of conductive tracks (7, 28) is formed on a semiconductor integrated circuit chip (14, 30).
Claim 45
Dependent Claim
33 words
The electrical connection structure according to any one of claims 28 to 40,wherein said second set of a plurality of conductive tracks (7, 28) is a plurality of lead electrodes of electronic parts.
Claim 46
Dependent Claim
19 words
The electrical connection structure according to claim 41, wherein said electronic parts are a semiconductor integrated circuit (14, 30).
Claim 47
Dependent Claim
25 words
The electrical connection structure according to claim 41 or 42, further comprising a flexible sheet covering connection portions of said first and said second tracks.
References Cited (Backward Citations)
JPS56138881A
Cited
EP0068739A1
Cited
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