Patent US3693771A successfully refreshed from Google Patents.
US4415917A
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Lead frame for integrated circuit devices
Assignee: Sumitomo Metal Mining Co Ltd
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Filing: 1981-08-17
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Granted: 1983-11-15
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Expires: 2001-08-17
Abstract
Abstract A lead frame for an IC device includes a body element located at its center, the body element including recesses in its outer periphery in which the inner tips of the leads of the lead frame are fitted at predetermined positions. With such an arrangement, the leads are prevented from being deformed during steps of formation of the IC device.
Inventors
- 👤 Hiroshi Chiba
- 👤 Shoichi Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:47
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/421; H10W70/435; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A lead frame for an integrated circuit device, said lead frame including support strips; a plurality of leads which have outer ends and inner ends, the outer ends of the leads being connected to the support strips and the inner ends extending toward the center of the lead frame; and a removable body element positioned at the center of the lead frame, the body element including recesses in its outer periphery, in the tips of the inner ends of the leads being positionable in the recesses to prevent their being displaced with respect to one another.
Claim 2
Dependent Claim
96 words
A lead frame for an integrated circuit device, said lead frame including support strips; a plurality of leads which have outer ends and inner ends, the outer ends of the leads being connected to the support strips and the inner ends extending toward the center of the lead frame; and a removable body element positioned at the center of the lead frame, the body element including recesses in its outer periphery, in the tips of the inner ends of the leads being positionable in the recesses to prevent their being displaced with respect to one another.
Claim 3
Dependent Claim
40 words
A lead frame as claimed in claim 1 wherein the inner ends of the leads extend towards the center of the lead frame to form a generally rectangular space therein, and wherein said body element is generally rectangular in shape.
Claim 4
Dependent Claim
23 words
A lead frame as claimed in claim 2 wherein each of the leads is bent at an angle of 90° along its length.
Claim 5
Dependent Claim
23 words
A lead frame as claimed in claim 1 wherein the recesses in the outer periphery of the body element are equally spaced apart.
Claim 6
Dependent Claim
32 words
A lead frame as claimed in claim 1 wherein the body element includes a central hole to enable it to be removed from its position at the center of the lead frame.
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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |