US5199879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical assembly with flexible circuit
Assignee: International Business Machines Corp
•
Filing: 1992-02-24
•
Granted: 1993-04-06
•
Expires: 2012-02-24
Abstract
Abstract An electrical assembly which includes a first circuit member (e.g., TCM) with at least one conductive pin projecting therefrom for being frictionally and electrically engaged by a flexible portion of circuit means of a second circuit member (e.g., PCB). An opening is provided within the PCB relative to the flexible portions such that these portions project at least partly across the opening and frictionally engage respective conductive portions of the pin when inserted within the opening. Each of these flexible portions in turn is part of a circuit layer which may be coupled to respective conductive planes or the like within the PCB, while the respective conductive portions of the pin may in turn be electrically coupled to various conductive layers within/upon the TCM.
Inventors
- 👤 Harold Kohn
- 👤 Kishor V. Desai
- 👤 Ronald J. Romanosky
- 👤 George J. Saxenmeyer, Jr.
- 👤 Reinhold E. Tomek
- 👤 James R. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:14
CPC Classifications
H; H01; H01R; H01R24/00; H01R24/58; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/325; H05K3/326; H01R2103/00; H05K1/00; H05K1/02; H05K1/11; H05K1/118; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/091; H05K2201/09209; H05K2201/09654; H05K2201/09809; H05K2201/10; H05K2201/10431; H05K2201/1059; H05K2201/10613; H05K2201/10621; H05K2201/10704; H05K3/306; H05K3/46; H05K3/4688; H05K3/4691
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
181 words
A electrical assembly comprising: a first circuit member including a circuitized substrate having first and second layers of circuitry as part thereof and at least one conductive pin projecting from said substrate and including first and second conductive portions electrically coupled to said first and second layers of circuitry, respectively, said second conductive portion being coaxially positioned about said first conductive portion to substantially reduce electrical interference between said pin and adjacent pins during operation of said assembly; and a second circuit member for being electrically coupled to said first circuit member and including a dielectric substrate having an opening therein and circuit means located on or within said dielectric substrate and including first and second flexible portions extending at least partly across said opening at spaced-apart locations therein, said first and second flexible portions of said circuit means adapted for frictionally and electrically engaging said first and second conductive portions of said conductive pin, respectively when said pin is positioned within said opening of said second circuit member to provide said electrical coupling between said first and second circuit members.
Claim 2
Dependent Claim
181 words
A electrical assembly comprising: a first circuit member including a circuitized substrate having first and second layers of circuitry as part thereof and at least one conductive pin projecting from said substrate and including first and second conductive portions electrically coupled to said first and second layers of circuitry, respectively, said second conductive portion being coaxially positioned about said first conductive portion to substantially reduce electrical interference between said pin and adjacent pins during operation of said assembly; and a second circuit member for being electrically coupled to said first circuit member and including a dielectric substrate having an opening therein and circuit means located on or within said dielectric substrate and including first and second flexible portions extending at least partly across said opening at spaced-apart locations therein, said first and second flexible portions of said circuit means adapted for frictionally and electrically engaging said first and second conductive portions of said conductive pin, respectively when said pin is positioned within said opening of said second circuit member to provide said electrical coupling between said first and second circuit members.
Claim 3
Dependent Claim
21 words
The electrical assembly of claim 1 wherein said circuitized substrate includes a dielectric portion, said dielectric portion being comprised of ceramic.
Claim 4
Dependent Claim
28 words
The electrical assembly of claim 1 wherein said first layer of circuitry comprises a signal layer and said second layer of circuitry comprises a power or ground layer.
Claim 5
Dependent Claim
34 words
The electrical assembly of claim 1 further including a solder column, said solder column electrically coupling said first conductive portion of said pin to said first layer of circuitry of said first circuit member.
Claim 6
Dependent Claim
84 words
The electrical assembly of claim 1 wherein said first and second conductive portions of said conductive pin each include outer rounded edges, said first of said flexible portions being adapted for engaging the outer rounded edges of said first conductive portion of said pin and said second of said flexible portions being adapted for engaging the outer rounded edges of said second conductive portion of said pin when said pin is positioned within said opening to enable withdrawal of said pin from said opening.
Claim 7
Dependent Claim
37 words
The electrical assembly of claim 5 wherein each of said first and second flexible portions of said circuit means comprises a plurality of tabs, each of said tabs adapted for frictionally and electrically engaging said conductive pin.
Claim 8
Dependent Claim
23 words
The electrical assembly of claim 6 wherein the number of said tabs of each of said first and second flexible portions is four.
Claim 9
Dependent Claim
26 words
The electrical assembly of claim 1 further including a layer of electrically insulative material located between said first and second conductive portions of said conductive pin.
Claim 10
Dependent Claim
13 words
The electrical assembly of claim 8 wherein said electrically insulative material is polyimide.
Claim 11
Dependent Claim
23 words
The electrical assembly of claim 1 wherein said first and second conductive portions of said conductive pin are comprised of a copper-nickel alloy.
Claim 12
Dependent Claim
35 words
The electrical assembly of claim 1 wherein said flexible portion of said circuit means comprises a dielectric layer having at least one conductive layer thereon, said conductive layer frictionally and electrically engaging said conductive pin.
Claim 13
Dependent Claim
18 words
The electrical assembly of claim 11 wherein said dielectric layer of said flexible portion is comprised of polyimide.
Claim 14
Dependent Claim
18 words
The electrical assembly of claim 11 wherein said conductor layer of said flexible portion is comprised of copper.
Claim 15
Dependent Claim
37 words
The electrical assembly of claim 11 including at least two conductor layers on said flexible portion, a first of said conductor layers being comprised of copper and a second of said conductor layers being comprised of nickel.
Claim 16
Dependent Claim
62 words
The electrical assembly of claim 11 including at least three conductor layers on said flexible portion, a first of said conductive layers being comprised of copper, a second of said conductor layers being comprised of nickel, and a third of said conductor layers being comprised of a precious metal, said nickel providing a diffusion barrier between said copper and said precious metal.
Claim 17
Dependent Claim
12 words
The electrical assembly of claim 15 wherein said precious metal is gold.
Claim 18
Dependent Claim
59 words
The electrical assembly of claim 11 including at least four conductor layers on said flexible portion, a first of said conductor layers being comprised of copper, a second of said conductor layers being comprised of nickel, a third of said conductor layers being comprised of palladium-nickel and a fourth of said conductive layers being comprised of a precious metal.
Claim 19
Dependent Claim
12 words
The electrical assembly of claim 19 wherein said precious metal is gold.
Claim 20
Dependent Claim
28 words
The electrical assembly of claim 1 wherein said second circuit member includes a conductive plane as part thereof, said circuit means being electrically connected to said conductive plane.
Claim 21
Dependent Claim
186 words
An information handling system comprising an electrical assembly including a first circuit member including a circuitized substrate having first and second layers of circuitry as part thereof and at least one conductive pin projecting from said substrate and including first and second conductive portions electrically coupled to said first and second layers of circuitry, respectively, said second conductive portion being coaxially positioned about said first conductive portion to substantially reduced electrical interference between said pin and adjacent pins during operation of said system, and a second circuit member for being electrically coupled to said first circuit member and including a dielectric substrate having an opening therein and circuit means located on or within said dielectric substrate and including first and second flexible portions extending at least partly across said opening at spaced-apart locations therein, said first and second flexible portions of said circuit means adapted for frictionally and electrically engaging said first and second conductive portions of said conductive pin, respectively, when said pin is positioned within said opening of said second circuit member to provide said electrical coupling between said first and second circuit members.
Claim 22
Dependent Claim
186 words
An information handling system comprising an electrical assembly including a first circuit member including a circuitized substrate having first and second layers of circuitry as part thereof and at least one conductive pin projecting from said substrate and including first and second conductive portions electrically coupled to said first and second layers of circuitry, respectively, said second conductive portion being coaxially positioned about said first conductive portion to substantially reduced electrical interference between said pin and adjacent pins during operation of said system, and a second circuit member for being electrically coupled to said first circuit member and including a dielectric substrate having an opening therein and circuit means located on or within said dielectric substrate and including first and second flexible portions extending at least partly across said opening at spaced-apart locations therein, said first and second flexible portions of said circuit means adapted for frictionally and electrically engaging said first and second conductive portions of said conductive pin, respectively, when said pin is positioned within said opening of said second circuit member to provide said electrical coupling between said first and second circuit members.
References Cited (Backward Citations)
US1862275A
Cited
US3209066A
Cited
US3340491A
Cited
US3539965A
Cited
US3573707A
Cited
US3699495A
Cited
US3924918A
Cited
US4593959A
Cited
US4627678A
Cited
US4658104A
Cited
US4688151A
Cited
US4820171A
Cited
US4867691A
Cited
US4969259A
Cited
US5133669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |