US5225711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palladium enhanced soldering and bonding of semiconductor device contacts
Assignee: International Business Machines Corp
•
Filing: 1991-03-11
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Granted: 1993-07-06
•
Expires: 2011-03-11
Abstract
Abstract The fluxless bonding in a reducing atmosphere of integrated circuit contacts containing copper is enhanced using a layer of 200 to 1500 Angstrom thick palladium which inhibits copper oxide formation before fusion and reduces all oxides to promote wetting during fusion.
Inventors
- 👤 Chin-An Chang
- 👤 Nicholas G. Koopman
- 👤 Judith M. Roldan
- 👤 Steven Strickman
- 👤 Kamalesh K. Srivastava
- 👤 Helen L. Yeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:00
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; H; H01; H01R; H01R43/00; H01R43/02; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3431; H05K3/3436; H05K3/3465; H10; H10W; H10W72/00; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; H10W72/20; H10W72/251; H10W72/252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
In semiconductor integrated circuit manufacturing fluxless contact technology an intermediate manufacturing product comprising: a first layer member containing palladium in a thickness between 200 to 1500 Angstroms and in contact with a second member composed of at least one material taken from the group of partially oxidized copper and partially oxidized solder.
Claim 2
Dependent Claim
52 words
In semiconductor integrated circuit manufacturing fluxless contact technology an intermediate manufacturing product comprising: a first layer member containing palladium in a thickness between 200 to 1500 Angstroms and in contact with a second member composed of at least one material taken from the group of partially oxidized copper and partially oxidized solder.
Claim 3
Dependent Claim
13 words
The product of claim 1 wherein said first layer member is pure palladium.
Claim 4
Dependent Claim
14 words
The product of claim 1 wherein the material of said second member is copper.
Claim 5
Dependent Claim
14 words
The product of claim 1 wherein the material of said second member is solder.
Claim 6
Dependent Claim
14 words
The product of claim 2 wherein the material of said second member is copper.
Claim 7
Dependent Claim
13 words
The product of claim 5 wherein said second member is a copper block.
Claim 8
Dependent Claim
12 words
The product of claim 2 wherein said second layer is a solder.
Claim 9
Dependent Claim
71 words
In low temperature fluxless bonding semiconductor integrated circuit manufacturing contact technology an intermediate manufacturing product comprising: a first layer member containing palladium in a thickness between 200 and 1500 Angstroms and in contact with, a second member composed of a material taken from the group of copper and solder having in contact with said palladium containing layer at least one selected from the group of oxides of copper, tin and lead.
Claim 10
Dependent Claim
71 words
In low temperature fluxless bonding semiconductor integrated circuit manufacturing contact technology an intermediate manufacturing product comprising: a first layer member containing palladium in a thickness between 200 and 1500 Angstroms and in contact with, a second member composed of a material taken from the group of copper and solder having in contact with said palladium containing layer at least one selected from the group of oxides of copper, tin and lead.
Claim 11
Dependent Claim
12 words
The product of claim 8 wherein said second member is of copper.
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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) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |