US5262674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chip carrier for an integrated circuit assembly
Assignee: Motorola Solutions Inc
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Filing: 1992-04-09
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Granted: 1993-11-16
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Expires: 2012-04-09
Abstract
Abstract Epoxy bonding between an IC chip and a chip carrier is strengthened by creating substantially rougher oxidized surfaces within substantially smooth gold surfaces of a die paddle portion of the chip carrier.
Inventors
- 👤 Kingshuk Banerji
- 👤 Kenneth R. Thompson
- 👤 Francisco D. Alves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/611; H10W72/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/07351; H10W72/07353; H10W72/30; H10W72/331; H10W72/334; H10W72/351; H10W72/353; H10W72/354; H10W72/50; H10W72/541; H10W72/5445; H10W72/851; H10W72/874; H10W72/884; H10W72/90; H10W72/931; H10W72/932
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A chip carrier for an integrated circuit chip, comprising: a substrate having a conductive layer disposed on one major side, said conductive layer having a surface for mounting said integrated circuit chip thereon, wherein said surface includes at least one substantially smooth surface and at least one selectively created rougher surface, said rougher surfaces being made of an oxide of the material of the conductive layer.
Claim 2
Dependent Claim
66 words
A chip carrier for an integrated circuit chip, comprising: a substrate having a conductive layer disposed on one major side, said conductive layer having a surface for mounting said integrated circuit chip thereon, wherein said surface includes at least one substantially smooth surface and at least one selectively created rougher surface, said rougher surfaces being made of an oxide of the material of the conductive layer.
Claim 3
Dependent Claim
14 words
The chip carrier of claim 1, wherein said smooth surface comprises a gold surface.
Claim 4
Dependent Claim
32 words
The integrated circuit assembly of claim 1, wherein said conductive layer includes a layer of copper, wherein said smooth surface comprise a copper surface and said rougher surfaces comprise oxides of copper.
Claim 5
Dependent Claim
22 words
The integrated circuit of claim 3, wherein said conductive layer further includes a layer of nickel disposed on the smooth copper surface.
Claim 6
Dependent Claim
21 words
The integrated circuit of claim 4, wherein said conductive layer includes a layer of gold disposed on the layer of nickel.
Claim 7
Dependent Claim
70 words
An integrated circuit assembly, comprising: an integrated circuit chip; a chip carrier including: a substrate having a conductive layer disposed on one major side, said conductive layer having a surface for mounting said integrated circuit chip thereon, wherein said surface includes at least one substantially smooth surface and at least one selectively created rougher surface, said rougher surface being made of an oxide of the material of the conductive layer.
Claim 8
Dependent Claim
70 words
An integrated circuit assembly, comprising: an integrated circuit chip; a chip carrier including: a substrate having a conductive layer disposed on one major side, said conductive layer having a surface for mounting said integrated circuit chip thereon, wherein said surface includes at least one substantially smooth surface and at least one selectively created rougher surface, said rougher surface being made of an oxide of the material of the conductive layer.
Claim 9
Dependent Claim
15 words
The integrated circuit assembly of claim 6, wherein said smooth surface comprises a gold surface.
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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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |