US4650545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyimide embedded conductor process
Assignee: Tektronix Inc
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Filing: 1985-02-19
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Granted: 1987-03-17
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Expires: 2005-02-19
Abstract
Abstract A polyimide embedded conductor process assures adherence of a metal conductor to a polyimide layer and allows closer spacing between conductors. The conductor is laid on a sacrificial substrate, and then the polyimide layer is laid over the conductor and substrate. The substrate is etched away to expose the conductor, and the polyimide layer may be etched away from the conductor to form attachment tabs.
Inventors
- 👤 Carl W. Laakso
- 👤 John J. Reagan
- 👤 Robert L. Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4092; H05K3/10; H05K3/20; H05K3/205; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0152; H05K2203/03; H05K2203/0376; H05K2203/07; H05K2203/0703; H05K2203/0726; H05K3/0011; H05K3/0017; H05K3/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
A polyimide embedded conductor process comprising the steps of: depositing a single layer conductor directly on a sacrificial substrate in a particular configuration; laying on a polyimide layer over said conductor and said sacrificial substrate; and etching away said sacrificial substrate to expose said conductor; whereby said conductor is securely attached to said polyimide layer.
Claim 2
Dependent Claim
55 words
A polyimide embedded conductor process comprising the steps of: depositing a single layer conductor directly on a sacrificial substrate in a particular configuration; laying on a polyimide layer over said conductor and said sacrificial substrate; and etching away said sacrificial substrate to expose said conductor; whereby said conductor is securely attached to said polyimide layer.
Claim 3
Dependent Claim
27 words
A process as recited in claim 1 further comprising the step of selectively etching away said polyimide to expose portions of said conductor to form attachment tabs.
Claim 4
Dependent Claim
25 words
A process as recited in claim 1 further comprising the step of etching said particular configuration into said sacrificial substrate prior to said depositing step.
References Cited (Backward Citations)
US3039177A
Cited
US3350250A
Cited
US3711625A
Cited
US4306925A
Cited
US4125441A
Cited
US4141782A
Cited
US4231154A
Cited
US4396457A
Cited
US4517051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |