US4803540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor integrated circuit packages
Assignee: AMERICAN TELEPHONE AND TELEGRAPH Co AT&T BELL LABS
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Filing: 1986-11-24
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Granted: 1989-02-07
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Expires: 2006-11-24
Abstract
Abstract A lead frame for mounting a semiconductor chip in an integrated circuit package incorporates a deformation absorbing member as an integral part of the paddle support arm so that the initial, desired physical and electrical characteristics are unaltered after a forming operation such as paddle downsetting.
Inventors
- 👤 Harold W. Moyer
- 👤 Harry R. Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:48
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/421; H10W70/433; H10W72/00; H10W72/50; H10W72/531; H10W72/5363; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A semiconductor integrated circuit package comprising: a semiconductor integrated circuit chip; a lead frame, said lead frame having a paddle on which said chip is mounted and paddle support arms; and an external mounting frame having a plurality of fingers, electrical connections from said chip to said fingers, said paddle being connected to said external mounting frame by said paddle support arms CHARACTERIZED IN THAT said paddle support arms comprise a deformation absorbing member, said paddle being depressed with respect to said external mounting frame, said deformation absorbing member localizing deformation during paddle downsetting and maintaining desired physical characteristics.
Claim 2
Dependent Claim
99 words
A semiconductor integrated circuit package comprising: a semiconductor integrated circuit chip; a lead frame, said lead frame having a paddle on which said chip is mounted and paddle support arms; and an external mounting frame having a plurality of fingers, electrical connections from said chip to said fingers, said paddle being connected to said external mounting frame by said paddle support arms CHARACTERIZED IN THAT said paddle support arms comprise a deformation absorbing member, said paddle being depressed with respect to said external mounting frame, said deformation absorbing member localizing deformation during paddle downsetting and maintaining desired physical characteristics.
Claim 3
Dependent Claim
17 words
A package as recited in claim 1 in which said deformation absorbing member comprises a T bar.
Claim 4
Dependent Claim
18 words
A package as recited in claim 1 in which said deformation absorbing member comprises an S bend member.
Claim 5
Dependent Claim
17 words
A package as recited in claim 1 in which said deformation absorbing member comprises an annular member.
Claim 6
Dependent Claim
17 words
A package as recited in claim 1 in which said deformation absorbing member comprises a wrinkle member.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |