US3623649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge bonding tool for the attachment of semiconductor leads
Assignee: Motors Liquidation Co
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Filing: 1969-06-09
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Granted: 1971-11-30
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Expires: 1989-06-09
Abstract
Abstract A bonding tool and method is disclosed for bonding the ends of a threadlike wire lead to two spaced-apart regions of a semiconductive device or other electronic article. One form of this invention includes a bonding tool having a tip for use with a reel of lead wire. The tip has an outwardly extending tapered groove on its working surface for producing an elongated wedgeshaped bond with the thinnest section of the wedge at the end of the bond adjacent to the reel. The unbonded wire adjacent the thinnest wedge section, extending from the source reel, is readily detached from the bonded portion with a light tug.
Inventors
- 👤 Wayne H Keisling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:42
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/099; H10W72/00; H10W72/071; H10W72/0711; H10W72/07141; H10W72/075; H10W72/07521; H10W72/07531; H10W72/07532; H10W72/07533; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W72/5525; H10W90/00; H10W90/701; H10W90/751; H10W90/754; Y; Y10; Y10S; Y10S228/00; Y10S228/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A wire-bonding tool which comprises an elongated member having a working end surface, a lead-receiving passageway in said member extending to said working end surface, and at least one tapered groove in said end surface extending transversely from said passageway to the periphery of said working end surface, said tapered groove having a depth adjacent said periphery exceeding the depth of said groove adjacent said passageway.
Claim 2
Dependent Claim
66 words
A wire-bonding tool which comprises an elongated member having a working end surface, a lead-receiving passageway in said member extending to said working end surface, and at least one tapered groove in said end surface extending transversely from said passageway to the periphery of said working end surface, said tapered groove having a depth adjacent said periphery exceeding the depth of said groove adjacent said passageway.
Claim 3
Dependent Claim
24 words
The bonding tool as recited in claim 1 wherein the length of the tapered groove is at least about 3 times the lead diameter.
Claim 4
Dependent Claim
55 words
The bonding tool as recited in claim 2 wherein the shallowest depth of the tapered groove is at least about 0.1 times lead diameter to about 0.5 times lead diameter adjacent the passageway and the greatest depth of the tapered groove is less than lead diameter to about 0.5 times lead diameter adjacent the periphery.
Claim 5
Dependent Claim
29 words
The bonding tool as recited in claim 3 wherein the radius of curvature of the tapered groove is at least about 0.5 times lead diameter to about lead diameter.
Claim 6
Dependent Claim
115 words
A wire bonding tool which comprises an elongated member, an elongated working end surface on said member, a passageway extending longitudinally through said member to said end surface for guiding a wire lead onto said end surface, a pair of tapered grooves extending transversely from opposite sides of said passageway to the periphery of said end surface, said grooves having a length about 5 times the lead diameter, a depth approximately 0.6 times the lead diameter adjacent the periphery of said end surface and a depth of approximately 0.2 times the lead diameter adjacent said passageway and a radius of curvature approximately 0.6 times lead diameter for bonding the wire lead onto a preselected part.
Claim 7
Dependent Claim
115 words
A wire bonding tool which comprises an elongated member, an elongated working end surface on said member, a passageway extending longitudinally through said member to said end surface for guiding a wire lead onto said end surface, a pair of tapered grooves extending transversely from opposite sides of said passageway to the periphery of said end surface, said grooves having a length about 5 times the lead diameter, a depth approximately 0.6 times the lead diameter adjacent the periphery of said end surface and a depth of approximately 0.2 times the lead diameter adjacent said passageway and a radius of curvature approximately 0.6 times lead diameter for bonding the wire lead onto a preselected part.
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |