US4766095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing eprom device
Assignee: Oki Electric Industry Co Ltd
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Filing: 1985-01-04
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Granted: 1988-08-23
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Expires: 2005-01-04
Abstract
Abstract A method of manufacturing an EPROM IC device encapsulated in a plastic-molded package having a window for passing ultraviolet rays therethrough. An EPROM IC chip is fixed to a chip mounting region of a lead frame. The EPROM IC chip is placed in a hollow container made of a material capable of passing ultraviolet rays therethrough. A resin material capable of passing ultraviolet rays therethrough is introduced into the hollow container. A resultant structure is encapsulated plastic material except a surface of the hollow container, above the EPROM IC chip.
Inventors
- 👤 Okuaki Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:03
CPC Classifications
G; G11; G11C; G11C16/00; G11C16/02; G11C16/06; G11C16/10; G11C16/18; H; H10; H10W; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; 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: 3
Claim 1
Independent Claim
174 words
A method of manufacturing an EPROM IC device, comprising the steps of: (a) preparing an IC lead frame having a chip mounting region and a plurality of leads; (b) fixing an EPROM IC chip on a surface of said chip mounting region; (c) connecting pad electrodes of said EPROM IC chip to the leads of said IC lead frame with thin metal wires; (d) covering both the EPROM IC chip and the metal wires with a hollow container through which ultraviolet rays can pass, said container being made of a material selected from the group consisting of quartz, alumina and synthetic resins; (e) introducing a resin material which is capable of passing ultraviolet rays therethrough into said container to cure said resin material by heating and produce an assembled structure with the EPROM chip held in said container with the cured resin; (f) placing said structure obtained by the steps above in a mold; and (g) encapsulating said structure, except the bottom surface of said container, with an epoxy resin material in said mold.
Claim 2
Independent Claim
174 words
A method of manufacturing an EPROM IC device, comprising the steps of: (a) preparing an IC lead frame having a chip mounting region and a plurality of leads; (b) fixing an EPROM IC chip on a surface of said chip mounting region; (c) connecting pad electrodes of said EPROM IC chip to the leads of said IC lead frame with thin metal wires; (d) covering both the EPROM IC chip and the metal wires with a hollow container through which ultraviolet rays can pass, said container being made of a material selected from the group consisting of quartz, alumina and synthetic resins; (e) introducing a resin material which is capable of passing ultraviolet rays therethrough into said container to cure said resin material by heating and produce an assembled structure with the EPROM chip held in said container with the cured resin; (f) placing said structure obtained by the steps above in a mold; and (g) encapsulating said structure, except the bottom surface of said container, with an epoxy resin material in said mold.
Claim 3
Dependent Claim
15 words
A method according to claim 1, in which said hollow structure is a retangular container.
References Cited (Backward Citations)
US3611861A
Cited
US3660819A
Cited
US4326214A
Cited
JPS5366172A
Cited
JPS5776867A
Cited
JPS57162352A
Cited
JPS5856442A
Cited
US4460915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |