US4910045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces
Assignee: I&T INNOVATION TECHNOLOGY ENTWICKLUNGS-UND HOLDING AG
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Filing: 1988-12-02
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Granted: 1990-03-20
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Expires: 2008-12-02
Abstract
Abstract To improve the adhesive strength of electrolessly deposited metal deposits on surfaces of polyimide moulded bodies, the latter are treated with an activator formulation which, in addition to solvents, fillers and organometallic activators, preferably contains 5-25% of a polyimide as binder.
Inventors
- 👤 Henning Giesecke
- 👤 Gerhard D. Wolf
- 👤 Wilfried Zecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:54
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/386; H05K3/387
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
A process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces comprising treating the same with an activator formulation containing a binder, without pickling, wherein the formulation comprises (a) 0.03-4.00% by weight of an organometallic noble-metal compound as an activator, (b) 3-40% by weight of a polyimide binder, (c) 1-30% by weight of a filler and (d) 45-90% by weight of a solvent.
Claim 2
Dependent Claim
67 words
A process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces comprising treating the same with an activator formulation containing a binder, without pickling, wherein the formulation comprises (a) 0.03-4.00% by weight of an organometallic noble-metal compound as an activator, (b) 3-40% by weight of a polyimide binder, (c) 1-30% by weight of a filler and (d) 45-90% by weight of a solvent.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein said activator is an organometallic compound of the 1st or 8th subgroup.
Claim 4
Dependent Claim
39 words
A process according to claim 1, wherein said binder is an polyimide obtained by condensation of cyclic polycarboxylic acid anhydrides, polycarboxylic acid carboxylic acid anhydrides, polycarboxylic acids or polycarboxylic acid esters with polyamines, polyamides, polyisocyanates or polycarbamic acid esters.
Claim 5
Dependent Claim
25 words
A process according to claim 1, wherein said binder is an aliphatic-aromatic polyamideimide obtained by condensation of trimellitic anhydride with polyisocyanates and lactams or polyamides.
Claim 6
Dependent Claim
21 words
A printing paste formulation according to claim 1 useful for the production of printed circuits, foiled keyboards, switching mats and sensors.
Claim 7
Dependent Claim
46 words
A process according to claim 1, wherein the formulation comprises 0.05 to 3 weight % of the organometallic noble metal compound, 5 to 25 weight % of the polyimide 5 to 25 weight % of the filler and 60 to 80 weight % of the solvent.
Claim 8
Dependent Claim
23 words
A process according to claim 1, wherein the polyimide is a polyamideimide, a polyetherimide, a polyesterimide or a cocondensate or a mixture thereof.
Claim 9
Dependent Claim
31 words
A process according to claim 1, wherein the polyimide is a polyamideimide obtained from trimellitic anhydride, caprolactam and 4,4'-diisocyanatodiphenylmethane or from blends of 4,4'-diisocyanatodiphenylmethane and mixtures of 2,4- and 2,6-toluylene diisocyanate.
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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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |