US4554404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for lead frame for IC chip carrier
Assignee: Osram Sylvania Inc
•
Filing: 1984-03-26
•
Granted: 1985-11-19
•
Expires: 2004-03-26
Abstract
Abstract A support for a lead frame for use with an integrated circuit chip is made of electrically insulative material, preferably a thermoplastic. There is a pad area at the center of the support in which an IC chip can be disposed. Proximate the periphery of the pad are raised spaced-apart projections. The spaces between the projections define slots in which the leads of a lead frame can be disposed.
Inventors
- 👤 Thomas G. Gilder, Jr.
- 👤 Raymond D. O'Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:06
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/421; H10W70/442; H10W70/479; H10W70/60; H10W70/67; H10W70/68
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A lead frame support comprising a support made of an electrically insulative, thermoplastic material, a pad area at the center of said support in which an IC chip can be disposed, said pad area being square or rectangular, and first raised spaced-apart projections proximate the periphery of said pad area, on all four sides thereof, the spaces between the projections defining slots in which the leads of a lead frame can be disposed.
Claim 2
Dependent Claim
73 words
A lead frame support comprising a support made of an electrically insulative, thermoplastic material, a pad area at the center of said support in which an IC chip can be disposed, said pad area being square or rectangular, and first raised spaced-apart projections proximate the periphery of said pad area, on all four sides thereof, the spaces between the projections defining slots in which the leads of a lead frame can be disposed.
Claim 3
Dependent Claim
30 words
The lead frame support of claim 1 wherein said leads of said lead frame can be secured in said slots by heating and slightly flowing said projections over said leads.
Claim 4
Dependent Claim
23 words
The lead frame support of claim 2 wherein there is a trough in the support encircling said pad area and said first projections.
Claim 5
Dependent Claim
39 words
The lead frame support of claim 3 comprising, in addition, second raised spaced-apart projections proximate the periphery of said support, the spaces between said second projections defining slots in which said leads of said lead frame can be disposed.
Claim 6
Dependent Claim
13 words
The lead frame support of claim 4 wherein said pad area is recessed.
Claim 7
Dependent Claim
44 words
The lead frame support of claim 5 wherein said support has four sides and there are removable rails at only two of said sides, said rails being oppositely disposed from one another and being spaced from, and connected to, said support by tie bars.
References Cited (Backward Citations)
US3469684A
Cited
US3838984A
Cited
US4107555A
Cited
US4138691A
Cited
US4218701A
Cited
US4381602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |