Patent US4407860A successfully refreshed from Google Patents.
US4407860A
Expired / Lapsed
US
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Process for producing an improved quality electrolessly deposited nickel layer
Assignee: International Business Machines Corp
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Filing: 1981-06-30
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Granted: 1983-10-04
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Expires: 2001-06-30
Abstract
Abstract A method of providing a stress-free metal layer by electroless plating techniques, including the steps of (1) providing a substrate that includes some glass material in at least the surface areas to receive a metal layer, (2) depositing a layer of metal-boron by electroless plating techniques, and (3) heating the resultant metal-boron layer in a non-reacting and/or H 2 environment at a temperature of at least 750° C. for a time sufficient to diffuse the boron to the glass material in the substrate.
Inventors
- 👤 Rebecca P. Fleming
- 👤 Samuel Lawhorne, Jr.
- 👤 John J. Mele
- 👤 Chandrika Prasad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1603; C23C18/1607; C23C18/1608; C23C18/1633; C23C18/1646; C23C18/165; C23C18/1689; C23C18/1692; C23C18/1696; C23C18/31; C23C18/32; C23C18/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A process for providing a stress-free pure nickel layer on a ceramic substrate comprising screening on said ceramic substrate selected metallized surface areas formed of a particulate paste mixture that includes a refractory metal selected from the group consisting of Mo, Ta, W and Mn and mixtures thereof, and a particulate glass material in an amount in the range of 0.5 to 15% by weight, and sintering the surface areas, selectively depositing a layer of nickel-boron on said metallized surface areas of said substrate by electroless plating techniques, wherein said boron content is in the range of 0.1 to 3% by weight, and heating the resultant substrate and nickel-boron layer in a non-reacting environment at a temperature of at least 750° C. for a time sufficient to diffuse the boron from the nickel-boron layer to said glass in said metallized surface areas of the substrate, leaving essentially a pure stress-free nickel layer bonded to said substrate.
Claim 2
Dependent Claim
156 words
A process for providing a stress-free pure nickel layer on a ceramic substrate comprising screening on said ceramic substrate selected metallized surface areas formed of a particulate paste mixture that includes a refractory metal selected from the group consisting of Mo, Ta, W and Mn and mixtures thereof, and a particulate glass material in an amount in the range of 0.5 to 15% by weight, and sintering the surface areas, selectively depositing a layer of nickel-boron on said metallized surface areas of said substrate by electroless plating techniques, wherein said boron content is in the range of 0.1 to 3% by weight, and heating the resultant substrate and nickel-boron layer in a non-reacting environment at a temperature of at least 750° C. for a time sufficient to diffuse the boron from the nickel-boron layer to said glass in said metallized surface areas of the substrate, leaving essentially a pure stress-free nickel layer bonded to said substrate.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said substrate is heated in a wet or dry hydrogen environment at atmospheric pressure to a temperature in the range of 800° to 900° C.
Claim 4
Dependent Claim
40 words
The process of claim 1 wherein said substrate is heated in an inert environment of a gas selected from the group consisting of argon, helium, nitrogen, and mixtures thereof to a temperature in the range of 750° to 1200° C.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein said surface layer areas have a thickness in the range of 5 to 50 microns.
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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |