US4996116A
Expired / Lapsed
US
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Enhanced direct bond structure
Assignee: Intersil Corp
•
Filing: 1989-12-21
•
Granted: 1991-02-26
•
Expires: 2009-12-21
Abstract
Abstract A direct (metal-metal compound eutectic) bond process is improved by disposing a eutectic/substrate-wetting enhancement layer on the substrate prior to performing the direct bond process to bond a metal foil to the substrate. Where the metal is copper, the direct bond process is rendered more effective than prior art direct bond processes on alumina and beryllia and makes the direct bond process effective on tungsten, molybdenum and aluminum nitride, all of which were unusable with the prior art direct bond copper process. A variety of new, useful structures may be produced using this process. The eutectic/substrate-wetting enhancement layer is preferably a noble-like metal or includes a noble-like metal such as platinum, palladium and gold.
Inventors
- 👤 Harold F. Webster
- 👤 Constantine A. Neugebauer
- 👤 James F. Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:57
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/018; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/38; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12611; Y10T428/1266; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12833; Y10T428/12861; Y10T428/12868; Y10T428/12875; Y10T428/12889; Y10T428/12903
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
57 words
In combination: a substrate; a eutectic/substrate-wetting enhancement layer selected from the group consisting of platinum, palladium, gold and platinum, palladium or gold containing mixtures or alloys adhered to said substrate; a metal-metal compound eutectic selected from the group consisting of copper-copper oxide, nickel-nickel oxide, cobalt-cobalt oxide, iron-iron oxide and copper-copper sulfide bonded to said eutectic/substrate-wetting enhancement layer.
Claim 2
Dependent Claim
57 words
In combination: a substrate; a eutectic/substrate-wetting enhancement layer selected from the group consisting of platinum, palladium, gold and platinum, palladium or gold containing mixtures or alloys adhered to said substrate; a metal-metal compound eutectic selected from the group consisting of copper-copper oxide, nickel-nickel oxide, cobalt-cobalt oxide, iron-iron oxide and copper-copper sulfide bonded to said eutectic/substrate-wetting enhancement layer.
Claim 3
Dependent Claim
14 words
The combination recited in claim 1 wherein: said metal-metal compound eutectic is copper-copper oxide.
Claim 4
Dependent Claim
23 words
The combination recited in claim 1 further comprising: a further conductive member bonded to said eutectic/substrate-wetting enhancement layer by said metal-metal compound eutectic.
Claim 5
Dependent Claim
14 words
The combination recited in claim 3 wherein: said metal-metal compound eutectic is copper-copper oxide.
Claim 6
Dependent Claim
13 words
The combination recited in claim 4 wherein: said further conductive member is copper.
Claim 7
Dependent Claim
21 words
The combination recited in claim 4 wherein: said further conductive member is a platinum containing layer disposed on a second substrate.
Claim 8
Dependent Claim
13 words
The combination recited in claim 6 wherein: said further conductive member is platinum.
Claim 9
Dependent Claim
17 words
The combination recited in claim 3 wherein: said further conductive member is a second eutectic/substrate-wetting enhancement layer.
Claim 10
Dependent Claim
35 words
The combination recited in claim 8 wherein: said second eutectic/substrate-wetting enhancement layer is selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one of more of platinum, palladium and gold.
Claim 11
Dependent Claim
18 words
The combination recited in claim 8 wherein: said second eutectic/substrate-wetting enhancement layer is adhered to a second substrate.
Claim 12
Dependent Claim
15 words
The combination recited in claim 10 wherein: said second eutectic/substrate-wetting enhancement layer is platinum containing.
Claim 13
Dependent Claim
14 words
The combination recited in claim 11 wherein: said second eutectic/substrate-wetting enhancement layer is platinum.
Claim 14
Dependent Claim
15 words
The combination recited in claim 10 wherein: said second eutectic/substrate-wetting enhancement layer is palladium containing.
Claim 15
Dependent Claim
14 words
The combination recited in claim 11 wherein: said second eutectic/substrate-wetting enhancement layer is palladium.
Claim 16
Dependent Claim
15 words
The combination recited in claim 10 wherein: said second eutectic/substrate-wetting enhancement layer is gold containing.
Claim 17
Dependent Claim
14 words
The combination recited in claim 11 wherein: said second eutectic/substrate-wetting enhancement layer is gold.
Claim 18
Dependent Claim
26 words
The combination recited in claim 1 wherein said substrate is selected from the group consisting of: tungsten, tungsten-rhenium alloys, molybdenum, aluminum nitride, alumina, beryllia and copper.
Claim 19
Dependent Claim
28 words
The combination recited in claim 17 wherein: said metal-metal compound is selected from the group consisting of copper-copper oxide, nickel-nickel oxide, cobalt-cobalt oxide, iron-iron oxide and copper-copper sulfide.
Claim 20
Dependent Claim
16 words
The combination recited in claim 18 wherein: said metal-metal compound eutectic comprises copper and copper oxide.
Claim 21
Dependent Claim
23 words
The combination recited in claim 17 further comprising: a further conductive member bonded to said eutectic/substrate-wetting enhancement layer by said metal-metal compound eutectic.
Claim 22
Dependent Claim
22 words
The combination recited in claim 20 wherein: said further conductive member is a second eutectic/substrate-wetting enhancement layer disposed on a second substrate.
Claim 23
Dependent Claim
39 words
The combination recited in claim 21 wherein: the first recited and said second eutectic/substrate-wetting enhancement layers are selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one or more of platinum, palladium and gold.
Claim 24
Dependent Claim
27 words
The combination recited in claim 21 wherein: said second substrate is selected from the group consisting of tungsten, tungsten-rhenium alloys, molybdenum, aluminum nitride, alumina, beryllia and copper.
Claim 25
Dependent Claim
74 words
A symmetric laminate comprising: a core member having first and second opposed major surfaces; first and second eutectic/substrate-wetting enhancement layers selected from the group consisting of platinum, palladium, gold and mixtures and alloys containing one or more of platinum, palladium and gold respectively adhered to said first and second major surfaces of said core member; and first and second symmetric copper-copper oxide eutectic layers bonded respectively to said first and second eutectic/substrate-wetting enhancement layers.
Claim 26
Dependent Claim
74 words
A symmetric laminate comprising: a core member having first and second opposed major surfaces; first and second eutectic/substrate-wetting enhancement layers selected from the group consisting of platinum, palladium, gold and mixtures and alloys containing one or more of platinum, palladium and gold respectively adhered to said first and second major surfaces of said core member; and first and second symmetric copper-copper oxide eutectic layers bonded respectively to said first and second eutectic/substrate-wetting enhancement layers.
Claim 27
Dependent Claim
13 words
The symmetric laminate recited in claim 24 wherein: said core member is tungsten.
Claim 28
Dependent Claim
15 words
The symmetric laminate recited in claim 25 wherein: said eutectic/substrate-wetting enhancement layer is platinum containing.
Claim 29
Dependent Claim
14 words
The symmetric laminate recited in claim 26 wherein: said eutectic/substrate-wetting enhancement layer is platinum.
Claim 30
Dependent Claim
15 words
The symmetric laminate recited in claim 25 wherein: said eutectic/substrate-wetting enhancement layer is palladium containing.
Claim 31
Dependent Claim
14 words
The symmetric laminate recited in claim 28 wherein: said eutectic/substrate-wetting enhancement layer is palladium.
Claim 32
Dependent Claim
15 words
The symmetric laminate recited in claim 25 wherein: said eutectic/substrate-wetting enhancement layer is gold containing.
Claim 33
Dependent Claim
14 words
The symmetric laminate recited in claim 30 wherein: said eutectic/substrate-wetting enhancement layer is gold.
Claim 34
Dependent Claim
13 words
The symmetric laminate recited in claim 24 wherein: said core member is molybdenum.
Claim 35
Dependent Claim
13 words
The symmetric laminate recited in claim 24 wherein: said core member is alumina.
Claim 36
Dependent Claim
14 words
The symmetric laminate recited in claim 24 wherein: said core member is aluminum nitride.
Claim 37
Dependent Claim
13 words
The symmetric laminate recited in claim 24 wherein: said core member is beryllia.
Claim 38
Dependent Claim
75 words
In combination: a substrate having a first major surface; a plurality of spaced apart eutectic/substrate-wetting enhancement layer segments each selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one of more of platinum, palladium and gold and adhered to said first surface of said substrate; a plurality of metal segments, each bonded to a different one of said eutectic/substrate-wetting enhancement layer segments by a metal-metal compound eutectic comprising copper-copper oxide.
Claim 39
Dependent Claim
75 words
In combination: a substrate having a first major surface; a plurality of spaced apart eutectic/substrate-wetting enhancement layer segments each selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one of more of platinum, palladium and gold and adhered to said first surface of said substrate; a plurality of metal segments, each bonded to a different one of said eutectic/substrate-wetting enhancement layer segments by a metal-metal compound eutectic comprising copper-copper oxide.
Claim 40
Dependent Claim
14 words
The combination recited in claim 36 wherein: said metal-metal compound eutectic is copper-copper oxide.
Claim 41
Dependent Claim
12 words
The combination recited in claim 37 wherein: said metal segments comprise copper.
Claim 42
Dependent Claim
13 words
The combination recited in claim 38 wherein: said eutectic/substrate-wetting enhancement layers comprise platinum.
Claim 43
Dependent Claim
57 words
In combination: a body of aluminum nitride; a eutectic/substrate-wetting enhancement layer selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one of more of platinum, palladium and gold adhered to said aluminum nitride of said body; a metal-metal compound eutectic comprising copper-copper oxide bonding a further member to said eutectic/substrate-wetting enhancement layer.
Claim 44
Dependent Claim
57 words
In combination: a body of aluminum nitride; a eutectic/substrate-wetting enhancement layer selected from the group consisting of platinum, palladium, gold and mixtures or alloys containing one of more of platinum, palladium and gold adhered to said aluminum nitride of said body; a metal-metal compound eutectic comprising copper-copper oxide bonding a further member to said eutectic/substrate-wetting enhancement layer.
Claim 45
Dependent Claim
12 words
The combination recited in claim 40 wherein: said further member comprises copper.
Claim 46
Dependent Claim
11 words
The combination recited in claim 41 wherein: said metal is copper.
Claim 47
Dependent Claim
17 words
The combination recited in claim 42 wherein: said copper-copper oxide eutectic is native to said copper member.
Claim 48
Dependent Claim
14 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement layer is platinum containing.
Claim 49
Dependent Claim
12 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement is platinum.
Claim 50
Dependent Claim
14 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement layer is palladium containing.
Claim 51
Dependent Claim
13 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement layer is palladium.
Claim 52
Dependent Claim
14 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement layer is gold containing.
Claim 53
Dependent Claim
13 words
The combination recited in claim 40 wherein: said eutectic/substrate-wetting enhancement layer is gold.
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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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |