US4613549A
Expired / Lapsed
US
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Bonded metal-ceramics composite
Assignee: Toshiba Corp
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Filing: 1985-02-15
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Granted: 1986-09-23
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Expires: 2005-02-15
Abstract
Abstract A bonded metal-ceramics composite is disclosed which has a silicon ceramics member bonded to a metal member through the medium of an oxide layer. The oxide layer consists of a crystalline phase and an amorphous phase. The metal member adheres mainly to the amorphous phase of the oxide layer, exhibiting the phenomenon of local contact in stripes or dots.
Inventors
- 👤 Shun-ichiro Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:36
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3224; C04B2235/3225; C04B2235/3231; C04B2235/3232; C04B2235/38; C04B2235/3852; C04B2235/3865; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2235/6583; C04B2235/6584; C04B2235/70; C04B2235/96; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/09; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/365; C04B2237/368; C04B2237/40; C04B2237/402; C04B2237/403; C04B2237/405; C04B2237/406; C04B2237/407; C04B2237/408; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/70; C04B2237/708; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A bonded metal-ceramic composite comprising: (a) a ceramic member consisting essentially of a silicon ceramic; (b) an oxide layer on a surface of the silicon ceramic member, the oxide layer being in the form of a crystalline phase and an amorphous phase; and (c) a metal member diffusion bonded to the oxide layer by diffusion of the metal within the oxide layer.
Claim 2
Dependent Claim
62 words
A bonded metal-ceramic composite comprising: (a) a ceramic member consisting essentially of a silicon ceramic; (b) an oxide layer on a surface of the silicon ceramic member, the oxide layer being in the form of a crystalline phase and an amorphous phase; and (c) a metal member diffusion bonded to the oxide layer by diffusion of the metal within the oxide layer.
Claim 3
Dependent Claim
14 words
A bonded metal-ceramic composite according to claim 1, wherein said silicon ceramic contains aluminum.
Claim 4
Dependent Claim
29 words
A bonded metal-ceramic composite according to claim 1 or claim 2, wherein the aluminum content of said oxide layer falls in the range of 0.1 to 49% by weight.
Claim 5
Dependent Claim
22 words
A bonded metal-ceramic composite according to claim 1, wherein said metal member mainly adheres to said ceramic member through said amorphous phase.
Claim 6
Dependent Claim
17 words
A bonded metal-ceramic composite according to claim 1, wherein said metal is copper or a copper alloy.
Claim 7
Dependent Claim
17 words
The bonded metal-ceramic composite of claim 1, wherein the metal forms a compound within the oxide layer.
Claim 8
Dependent Claim
18 words
The bonded metal-ceramic composite of claim 1, wherein the metal forms a solid solution within the oxide layer.
Claim 9
Dependent Claim
25 words
A bonded metal-ceramic composite according to claim 1, wherein said silicon ceramic is selected from the group consisting of silicon nitride and silicon aluminum oxynitride.
Claim 10
Dependent Claim
19 words
A bonded metal-ceramic composite according to claim 8, wherein said silicon ceramic contains yttrium oxide as a sintering additive.
Claim 11
Dependent Claim
28 words
A bonded metal-ceramic composite according to claim 9, wherein said oxide layer is consists essentially of α-cristobalite, Y 2 O 3 .2SiO 2 and silicate glass containing aluminum.
Claim 12
Dependent Claim
26 words
A bonded metal-ceramic composite according to claim 10, wherein the bonding between said metal member and said amorphous phase occurs in the form of local contact.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |