Patent US4837805A successfully refreshed from Google Patents.
Patent US4590095A successfully refreshed from Google Patents.
US4590095A
Expired / Lapsed
US
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Nickel coating diffusion bonded to metallized ceramic body and coating method
Assignee: COORS PROCELAIN Co (COORS) A CO CORP
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Filing: 1985-06-03
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Granted: 1986-05-20
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Expires: 2005-06-03
Abstract
Abstract Pack cementation is used to diffusion bond substantially pore-free nickel to discrete exposed areas of tungsten or molybdenum that are in turn bonded to the surface of a ceramic body, e.g. in the preparation of a ceramic chip carrier.
Inventors
- 👤 Dong-Sil Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:06
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/245; H05K3/246; H10; H10W; H10W70/00; H10W70/01; H10W70/05; H10W70/60; H10W70/67; H10W70/68; H10W70/685; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K2203/00; H05K2203/13; H05K2203/1333; H05K2203/1338
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
A process for the nickel metallization of discrete exposed tungsten metal- or molybdenum metal-covered areas bonded to a ceramic substrate comprising the steps of: (a) cleaning said ceramic substrate and metal-covered areas, (b) embedding said cleaned ceramic substrate in a mixture of nickel powder, powdered activator and particulate inert filler located in a container, (c) heating said container and its contents in an non-oxidizing environment at a temperature in the range of from about 650° C. to about 1000° C. for a period of time ranging from about 1 minutes to about 120 minutes and (d) removing said ceramic substrate from said container, said discrete metal-covered areas each having a coating of nickel diffusion-bonded thereto.
Claim 2
Dependent Claim
115 words
A process for the nickel metallization of discrete exposed tungsten metal- or molybdenum metal-covered areas bonded to a ceramic substrate comprising the steps of: (a) cleaning said ceramic substrate and metal-covered areas, (b) embedding said cleaned ceramic substrate in a mixture of nickel powder, powdered activator and particulate inert filler located in a container, (c) heating said container and its contents in an non-oxidizing environment at a temperature in the range of from about 650° C. to about 1000° C. for a period of time ranging from about 1 minutes to about 120 minutes and (d) removing said ceramic substrate from said container, said discrete metal-covered areas each having a coating of nickel diffusion-bonded thereto.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the non-oxidizing environment is argon.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the non-oxidizing environment is nitrogen.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the non-oxidizing environment is argon plus hydrogen.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein the non-oxidizing environment is hydrogen.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the non-oxidizing environment is nitrogen plus hydrogen.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein the discrete metal-covered areas are areas of tungsten.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the discrete metal-covered areas are areas of molybdenum.
Claim 10
Dependent Claim
36 words
The process of claim 1 wherein the temperature is in the range of about 800° C. to about 900° C. and the time period is in the range of from about 2 to about 30 minutes.
Claim 11
Dependent Claim
19 words
The process of claim 1 wherein the concentration of nickel ranges from about 5 to about 20 wt. %.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the concentration of activator is in the range of from about 0.5 to about 4 wt. %.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein the activator is selected from the group consisting of ammonium iodide, ammonium chloride and ammonium bromide.
Claim 14
Dependent Claim
11 words
The process of claim 12 wherein the activator is ammonium iodide.
Claim 15
Dependent Claim
11 words
The process of claim 1 wherein the activator is ammonium iodide.
Claim 16
Dependent Claim
12 words
The process of claim 1 wherein the particulate inert filler is alumina.
Claim 17
Dependent Claim
17 words
The process of claim 1 wherein the entire cleaning consists of ultrasonic cleaning in an organic solvent.
Claim 18
Dependent Claim
11 words
The process of claim 16 wherein the organic solvent is alcohol.
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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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |