Patent US5066545A successfully refreshed from Google Patents.
US5066545A
Expired / Lapsed
US
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Process for forming polyimide-metal laminates
Assignee: Parlex Corp
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Filing: 1990-01-12
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Granted: 1991-11-19
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Expires: 2010-01-12
Abstract
Abstract Polyimide-metal laminates are formed by etching the surfaces of a polyimide web with a glycol-containing etchant followed by electroless nickel or cobalt deposition and then by copper deposition. The glycol-containing etchant can be utilized to form through holes through the web.
Inventors
- 👤 Daniel R. Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:04
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/381; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0344; H05K2203/00; H05K2203/12; H05K2203/122; H05K3/02; H05K3/022; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A laminate product which comprises a polyimide sheet having at least one through-hole extending between two surfaces of said sheet, said surfaces of said sheet and the surfaces of said through-hole being uniformly and completely hydrophilized, said polyimide sheet surfaces and the surfaces of said at least one through-hole being free of an adhesive and having a metal coating comprising an electroless nickel or cobalt coating and an electrolytic copper coating bonded to each of said nickel or cobalt coatings, said laminate sheet product having a peel strength of at least 6.0 lb./in. as measured by IPC test 2.4.9 Method A and a peel strength of at least 4.5 lb./in. as measured by IPC test 2.4.13 for solder float.
Claim 2
Dependent Claim
119 words
A laminate product which comprises a polyimide sheet having at least one through-hole extending between two surfaces of said sheet, said surfaces of said sheet and the surfaces of said through-hole being uniformly and completely hydrophilized, said polyimide sheet surfaces and the surfaces of said at least one through-hole being free of an adhesive and having a metal coating comprising an electroless nickel or cobalt coating and an electrolytic copper coating bonded to each of said nickel or cobalt coatings, said laminate sheet product having a peel strength of at least 6.0 lb./in. as measured by IPC test 2.4.9 Method A and a peel strength of at least 4.5 lb./in. as measured by IPC test 2.4.13 for solder float.
Claim 3
Dependent Claim
17 words
The product of claim 1 wherein said electroless nickel or cobalt coating is a nickel containing alloy.
Claim 4
Dependent Claim
23 words
The product of any one of claims 1 or 2 wherein each of said coating on said polyimide sheet including copper is patterned.
References Cited (Backward Citations)
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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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |