US4503452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic encapsulated semiconductor device and method for manufacturing the same
Assignee: Panasonic Holdings Corp
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Filing: 1982-05-14
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Granted: 1985-03-05
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Expires: 2002-05-14
Abstract
Abstract A plastic encapsulated semiconductor device and a method for manufacturing the same are provided. A substrate support supports a semiconductor substrate and serves as a heat sink. Strips are connected to one side of the substrate support and an external lead is connected to the opposite side of the substrate support. Parts of the strips extend from one side surface of a plastic encapsulating housing. At least one notch or recess is formed in one side surface of the plastic encapsulating housing. The strips are then cut within at least one notch or recess so as not to extend the cut surfaces of the strips from the outermost side surface portion of the encapsulating housing.
Inventors
- 👤 Masami Yokozawa
- 👤 Isao Kanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/01; H10W74/016; H10W70/00; H10W70/40; H10W70/481; H10W72/00; H10W72/01; H10W72/0198; H10W74/10; H10W74/111; H10W74/121
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A plastic encapsulated semiconductor device comprising a semiconductor device on a support substrate embedded in a plastic encapsulating housing having a top surface, bottom surface and side surfaces, external leads, connected to said semiconductor device, extending from a side surface of said housing, a notched portion on a side surface opposite to the side surface from which said external leads extend, said substrate support having strips connected thereto which extend to said side having the notched portion, said strips being cut off within said notched portion to prevent electrical contact with said strips.
Claim 2
Dependent Claim
93 words
A plastic encapsulated semiconductor device comprising a semiconductor device on a support substrate embedded in a plastic encapsulating housing having a top surface, bottom surface and side surfaces, external leads, connected to said semiconductor device, extending from a side surface of said housing, a notched portion on a side surface opposite to the side surface from which said external leads extend, said substrate support having strips connected thereto which extend to said side having the notched portion, said strips being cut off within said notched portion to prevent electrical contact with said strips.
Claim 3
Dependent Claim
35 words
A device according to claim 1, wherein said notched portion of said plastic encapsulating housing comprises a plurality of notches on said side surface opposite to the side surface from which said external leads extend.
Claim 4
Dependent Claim
58 words
A device according to claim 1, wherein said side surface opposite to the side surface from which said external leads extend has two corners and said notched portion of said plastic encapsulating housing comprises notches at both corners of said side surface of said plastic encapsulating housing opposite to the side surface from which said external leads extend.
Claim 5
Dependent Claim
41 words
A device according to claim 1, wherein said notched portion of said plastic encapsulating housing comprises at least one recess formed at said side surface of said plastic encapsulating housing opposite to the side surface from which said external leads extend.
References Cited (Backward Citations)
US3716764A
Cited
US3611250A
Cited
US3793709A
Cited
JPS54111766A
Cited
GB2028584A
Cited
JPS5619646A
Cited
JPS5662344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |