Patent US4985749A successfully refreshed from Google Patents.
US4985749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate for very large scale integrated circuit and apparatus for selective tinning of the substrate leads
Assignee: Bull SAS
•
Filing: 1989-03-20
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Granted: 1991-01-15
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Expires: 2009-03-20
Abstract
Abstract The TAB substrate (10) of the very large scale integrated circuit (11) includes an insulating sheet (12) including a window (13) provided with leads (14) overhanging it, a tinned zone (19) in the window to facilitate the operation of outer lead bonding. The lead (14) may be bare or gold-plated.
Inventors
- 👤 Claude Berneur
- 👤 Jean-Pierre Boiteau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:52
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/04; H10W70/047; H10W70/40; H10W70/453; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
A substrate for an integrated circuit, comprising an insulating sheet, a window in the insulating sheet, and cantilevered leads around the window, each of said leads having a tinned zone extending along only a portion of the length of said leads on the inside of the window and spaced apart from an end zone for connection to the integrated circuit inside the window.
Claim 2
Dependent Claim
63 words
A substrate for an integrated circuit, comprising an insulating sheet, a window in the insulating sheet, and cantilevered leads around the window, each of said leads having a tinned zone extending along only a portion of the length of said leads on the inside of the window and spaced apart from an end zone for connection to the integrated circuit inside the window.
Claim 3
Dependent Claim
73 words
A substrate for an integrated circuit, comprising an insulating sheet, a window in the insulating sheet, and cantilevered leads disposed around the window and extending inside the window, each of said leads comprising an end connection zone inside the window disposed to be connected to said integrated circuit, and a tinned zone inside the window extending along a portion of the length of each of said leads apart from said end connection zone.
Claim 4
Dependent Claim
73 words
A substrate for an integrated circuit, comprising an insulating sheet, a window in the insulating sheet, and cantilevered leads disposed around the window and extending inside the window, each of said leads comprising an end connection zone inside the window disposed to be connected to said integrated circuit, and a tinned zone inside the window extending along a portion of the length of each of said leads apart from said end connection zone.
Claim 5
Dependent Claim
17 words
A substrate as defined by claim 2, wherein the leads are gold plated except in said portion.
Claim 6
Dependent Claim
21 words
A substrate as defined by claim 3, characterized in that the tinned zone corresponds to an outer lead bonding soldering zone.
Claim 7
Dependent Claim
30 words
A substrate as defined by claim 3, characterized in that the insulating sheet forms a TAB tape provided with successive windows for the support of a plurality of integrated circuits.
Claim 8
Dependent Claim
23 words
A substrate as defined by claim 5, characterized in that it is separated from the TAB tape and mounted in a rigid frame.
Claim 9
Dependent Claim
21 words
A substrate as defined by claim 2, characterized in that the tinned zone corresponds to an outer lead bonding soldering zone.
Claim 10
Dependent Claim
30 words
A substrate as defined by claim 7, characterized in that the insulating sheet forms a TAB tape provided with successive windows for the support of a plurality of integrated circuits.
Claim 11
Dependent Claim
23 words
A substrate as defined by claim 8, characterized in that it is separated from the TAB tape and mounted in a rigid frame.
Claim 12
Dependent Claim
30 words
A substrate as defined by claim 2, characterized in that the insulating sheet forms a TAB tape provided with successive windows for the support of a plurality of integrated circuits.
Claim 13
Dependent Claim
23 words
A substrate as defined by claim 10, characterized in that it is separated from the TAB tape and mounted in a rigid frame.
References Cited (Backward Citations)
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JPS54113249A
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JPS56167357A
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JPS5779653A
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Cited
JPS6230342A
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JPS62219950A
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |