US4667867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire bonding tool
Assignee: Osram Sylvania Inc
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Filing: 1986-07-01
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Granted: 1987-05-26
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Expires: 2006-07-01
Abstract
Abstract A wire bonding tool is disclosed which comprises a metal or cermet stem and a silicon nitride containing tip. The tip is made of a silicon nitride containing composite which is electrically conducting. One end of the tip is fixedly mounted to one end of the stem.
Inventors
- 👤 Robert J. Dobbs
- 👤 Christopher A. Tarry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/002; B23K20/004; B23K20/005; B23K35/00; B23K35/02; B23K35/0205; H; H10; H10W; H10W72/00; H10W72/071; H10W72/0711; H10W72/07141
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
A wire bonding tool comprising a metal or cermet stem and a silicon nitride containing tip, said tip being made of silicon nitride containing composite which is electrically conducting, one end of said tip being fixedly mounted to one end of said stem.
Claim 2
Dependent Claim
43 words
A wire bonding tool comprising a metal or cermet stem and a silicon nitride containing tip, said tip being made of silicon nitride containing composite which is electrically conducting, one end of said tip being fixedly mounted to one end of said stem.
Claim 3
Dependent Claim
20 words
A wire bonding tool of claim 1 wherein said tip is mounted to said stem by means of a braze.
Claim 4
Dependent Claim
26 words
A wire bonding tool of claim 1 wherein said silicon nitride containing composite consists essentially of a conductive ceramic phase and a silicon nitride based phase.
Claim 5
Dependent Claim
48 words
A wire bonding tool of claim 3 wherein said conductive ceramic phase is selected from the group consisting of titanium nitride, titanium carbide, zirconium nitride, zirconium carbide, hafnium nitride, hafnium carbide, vanadium nitride, vanadium carbide, niobium nitride, niobium carbide, tantalum nitride, tantalum carbide, tungsten carbide, and combinations thereof.
Claim 6
Dependent Claim
24 words
A wire bonding tool of claim 4 wherein said conductive phase makes up from about 30% to about 50% by volume of said tip.
Claim 7
Dependent Claim
28 words
A wire bonding tool of claim 1 wherein said stem is made of a material selected from the group consisting of metals, metal alloys, cermets, and combinations thereof.
Claim 8
Dependent Claim
26 words
A wire bonding tool of claim 6 wherein said material of said stem is selected from the group consisting of cemented tungsten carbide and titanium metal.
Claim 9
Dependent Claim
17 words
A wire bonding tool of claim 7 wherein said material of said stem is cemented tungsten carbide.
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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |