Patent US3850327A successfully refreshed from Google Patents.
Patent US3751724A successfully refreshed from Google Patents.
US3751724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated electrical component
Assignee: Individual
•
Filing: 1972-04-28
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Granted: 1973-08-07
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Expires: 1992-04-28
Abstract
Abstract The lead frame of an electrical component has a generally circular and substantially continuous portion thereon that is indexed under a dispenser to receive a pre-metered drop of an encapsulant. The encapsulant viscosity and surface tension are such that it flows around and under this circular portion forming a protective mass therearound that is retained in place prior to being cured. The retained droplet thereby forms the final package shape and outline for the electrical component.
Inventors
- 👤 C Mcgrath
- 👤 R Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/421; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W74/00; H10W90/00; H10W90/701; H10W90/751; H10W90/756; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
The encapsulated component of claim 1 wherein said encapsulating material is an epoxy resin.
Claim 2
Dependent Claim
36 words
The encapsulated component of claim 1 wherein said component has four leads radially extending out therefrom; and said substantially ring-shaped body has a semiconductor chip thereon in electrical connection with at least two of said leads.
Claim 3
Dependent Claim
14 words
The encapsulated component of claim 3 wherein said encapsulating material is an epoxy resin.
Claim 4
Dependent Claim
48 words
The encapsulated component of claim 4 wherein said ring-shaped body has an orientation tab extending outwardly therefrom that is covered with said encapsulating material, and wherein a majority of said encapsulating material is atop said semiconductor chip while the other side of said ring-shaped body is substantially flattened.
Claim 5
Dependent Claim
40 words
The encapsulated component of claim 5 wherein said semiconductor chip has a protective coat of varnish thereon prior to encapsulation thereof; and wherein said four leads radially extend out from said ring-shaped body at approximately 90* angles from each other.
Claim 6
Dependent Claim
112 words
An encapsulated electrical component comprising a transistor having four leads radially extending out from a ring-shaped body at approximately 90* angles from each other, said ring-shaped body has a semiconductor chip thereon in electrical connection with two of said leads, and said ring-shaped body is substantially continuous and electrically non-conductive but having discontinuities within said body; an orientation tab extending out from said ring-shaped body; a protective coat of varnish on said semiconductor chip; an epoxy resin completely enveloping said ring-shaped body, said orientation tab and said semiconductor chip, and having a majority of said epoxy resin atop said semiconductor chip while the other side of said ring-shaped body is substantially flattened.
References Cited (Backward Citations)
US2836878A
Cited
US3564109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |