US4849292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for directly bonding ceramic and metal members and laminated body of the same
Assignee: Toshiba Corp
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Filing: 1987-04-22
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Granted: 1989-07-18
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Expires: 2007-04-22
Abstract
Abstract A laminated body comprising a ceramic member and a metal member, and a method of forming the laminated body are described. The laminated body is characterized in that the ceramic member contains in its surface portion a bonding agent and the metal member is directly bonded to the surface of the ceramic member. The method of forming the laminated body is characterized in that a bonding agent-containing layer is first formed in the surface of the ceramic member and then the bonding agent-containing layer is heated while being contacted with the metal member.
Inventors
- 👤 Nobuyuki Mizunoya
- 👤 Hajime Kohama
- 👤 Yasuyuki Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
B; B32; B32B; B32B9/00; B32B9/04; B32B9/041; B32B15/00; B32B15/04; B32B38/00; B32B38/0036; B32B7/00; B32B7/04; B32B7/12; B32B9/005; C; C04; C04B; C04B37/00; C04B37/02; C04B37/021; C04B37/023; C04B37/025; H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; H10W99/00; B32B2307/00; B32B2307/30; B32B2307/302; B32B2310/00; B32B2310/04; B32B2310/0445; B32B2310/0463; B32B2310/0472; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/064; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/345; C04B2237/348; C04B2237/36; C04B2237/365; C04B2237/366; C04B2237/368; C04B2237/40; C04B2237/403; C04B2237/405; C04B2237/406; C04B2237/407; C04B2237/50; C04B2237/54; C04B2237/70; C04B2237/708; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/38; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A heat conductive substrate comprising an aluminum nitride ceramic plate having a surface oxidized at a thickness of 20 microns or less and a copper layer directly bonded to said oxidized surface, a eutectic crystal being formed between the copper layer and said oxidized surface.
Claim 2
Dependent Claim
45 words
A heat conductive substrate comprising an aluminum nitride ceramic plate having a surface oxidized at a thickness of 20 microns or less and a copper layer directly bonded to said oxidized surface, a eutectic crystal being formed between the copper layer and said oxidized surface.
Claim 3
Dependent Claim
18 words
A heat conductive substrate according to claim 1, wherein said aluminum nitride ceramic plate contains a sintering auxiliary.
Claim 4
Dependent Claim
29 words
A heat conductive substrate according to claim 2, wherein said sintering auxiliary is selected from the group consisting of: oxides and carbonates of yttrium, aluminum, calcium, strontium or beryllium.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |