Patent US5268331A successfully refreshed from Google Patents.
US5268331A
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US
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Stabilizer/spacer for semiconductor device lead frames
Assignee: Texas Instruments Inc
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Filing: 1992-01-07
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Granted: 1993-12-07
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Expires: 2012-01-07
Abstract
Abstract The invention is to a method for plasma spraying a ceramic or plastic material on selected areas of leads to form stabilizer/spacers for the leads.
Inventors
- 👤 Donald C. Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:24
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/04; H10W70/40; H10W70/421; H10W70/435; H10P; H10P72/00; H10P72/04; H10P72/0438; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A method for providing a stabilizer/spacer for leads of a semiconductor device lead frame having a plurality of leads and a semiconductor die pad, comprising the steps of: masking selected adjacent areas on the leads; and plasma spraying a stabilizing material onto and between the selected adjacent areas on the leads.
Claim 2
Independent Claim
51 words
A method for providing a stabilizer/spacer for leads of a semiconductor device lead frame having a plurality of leads and a semiconductor die pad, comprising the steps of: masking selected adjacent areas on the leads; and plasma spraying a stabilizing material onto and between the selected adjacent areas on the leads.
Claim 3
Dependent Claim
22 words
The method according to claim 1, including the step of: selectively plating the leads prior to the application of the stabilizing material.
Claim 4
Dependent Claim
14 words
The method according to claim 1, wherein the stabilizing material is a ceramic material.
Claim 5
Dependent Claim
14 words
The method according to claim 1, wherein the stabilizing material is a plastic material.
Claim 6
Dependent Claim
21 words
The method according to claim 1, including the step of: selectively plating the leads after the application of the ceramic material.
Claim 7
Dependent Claim
39 words
The method according to claim 1, including the step of: moving the lead frame in X-Y directions to place the selected areas on the leads under the plasma torch during deposition of the ceramic material on the selected areas.
Claim 8
Dependent Claim
24 words
The method according to claim 1, including the step of depositing stabilizing material on second selected areas on said leads opposite said selected areas.
Claim 9
Dependent Claim
30 words
The method according to claim 1, including the step of plasma spraying ceramic material across all the leads of the lead frame in an enclosed pattern surrounding the die pad.
References Cited (Backward Citations)
US4320251A
Cited
US5087962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |