US4737112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anisotropically conductive composite medium
Assignee: Nokia Bell Labs
•
Filing: 1986-09-05
•
Granted: 1988-04-12
•
Expires: 2006-09-05
Abstract
Abstract Electrical interconnection is established by means of an anisotropically conductive, composite layer medium comprising electrically conductive particles in a nonconductive matrix material. Enhanced uniformity of conductivity across the medium, and minimized incidence of lateral shorting are achieved as a result of essentially uniform distribution of electrically conductive particles which are also magnetic, such distribution resulting upon application of a magnetic field essentially perpendicular to a layer before or during hardening of the matrix material.
Inventors
- 👤 Sungho Jin
- 👤 John J. Mottine, Jr.
- 👤 Stephen G. Seger, Jr.
- 👤 Richard C. Sherwood
- 👤 Thomas H. Tiefel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H01; H01R; H01R12/00; H01R12/70; H01R12/71; H01R12/712; H01R12/714; H01R13/00; H01R13/02; H01R13/03; H01R13/22; H01R13/24; H01R13/2407; H01R13/2414; H01R4/00; H01R4/04; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; H05K2201/00; H05K2201/08; H05K2201/083; H05K2203/00; H05K2203/10; H05K2203/104; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; H10W72/073; H10W72/07331; H10W72/251; H10W72/30; H10W72/321; H10W72/325; H10W72/351; H10W72/352; H10W72/353; H10W72/354; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2857
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
Device comprising a first component and a second component, said first component having a first surface comprising a first electrical contact, and said second component having a second surface comprising a second electrical contact, at least a first portion of said first electrical contact facing at least a second portion of said second electrical contact, the space between said first portion and said second portion being occupied essentially in an electrical interconnection layer which consists essentially of a composite material, said composite material comprising essentially spherical, electrically conductive particles in single-layer arrangement in a nonconductive matrix material such that particles individually form electrical connections between said first portion and said second portion, said device being characterized in that said particles comprise a magnetic material, distribution of said particles in said layer, individually or in pairs, being essentially uniform laterally as resulting from the application of an essentially uniform magnetic field essentially perpendicular to said layer before or during hardening of said matrix material.
Claim 2
Dependent Claim
163 words
Device comprising a first component and a second component, said first component having a first surface comprising a first electrical contact, and said second component having a second surface comprising a second electrical contact, at least a first portion of said first electrical contact facing at least a second portion of said second electrical contact, the space between said first portion and said second portion being occupied essentially in an electrical interconnection layer which consists essentially of a composite material, said composite material comprising essentially spherical, electrically conductive particles in single-layer arrangement in a nonconductive matrix material such that particles individually form electrical connections between said first portion and said second portion, said device being characterized in that said particles comprise a magnetic material, distribution of said particles in said layer, individually or in pairs, being essentially uniform laterally as resulting from the application of an essentially uniform magnetic field essentially perpendicular to said layer before or during hardening of said matrix material.
Claim 3
Dependent Claim
14 words
Device of claim 1 in which said essentially nonconductive material is an elastomeric material.
Claim 4
Dependent Claim
14 words
Device of claim 1 in which said essentially nonconductive material is an adhesive material.
Claim 5
Dependent Claim
14 words
Device of claim 1 in which said essentially nonconductive material is a glassy material.
Claim 6
Dependent Claim
14 words
Device of claim 1 in which said essentially nonconductive material is a thermoplastic material.
Claim 7
Dependent Claim
18 words
Device of claim 1 in which a surface portion of said electrically conductive particles comprises a corrosion-resistant material.
Claim 8
Dependent Claim
17 words
Device of claim 1 in which a surface portion of said electrically conductive particles is easily deformable.
References Cited (Backward Citations)
US4113981A
Cited
US4003621A
Cited
US4209481A
Cited
US4292261A
Cited
US4170677A
Cited
GB2068645A
Cited
US4606962A
Cited
US4548862A
Cited
US4644101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |