Patent US5052907A successfully refreshed from Google Patents.
US5052907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin sealing apparatus for use in manufacturing a resin-sealed semiconductor device
Assignee: Toshiba Corp
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Filing: 1990-07-03
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Granted: 1991-10-01
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Expires: 2010-07-03
Abstract
Abstract A resin sealing apparatus that has separable molds having a pot in which resin is injected. The pot communicates with cavities, in which semiconductor chips are set, by runners. The runners lead the resin injected in the pot to the cavities. A recess is provided at the distal end of each runner to hold the resin and air pressed out from the runner.
Inventors
- 👤 Yoshihiko Matumoto
- 👤 Hisanobu Takahama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2701; Y; Y10; Y10S; Y10S425/00; Y10S425/228
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A resin sealing apparatus for use in sealing semiconductor chips with resin comprising: a mold; a pot within said mold in which the resin is injected; cavities within said mold in which the semiconductor chips are set; runners within said mold communicating with the pot and the cavities for leading the resin from the pot to the cavities, each of said runners having a circular cross section and a distal end closed within said mold; and recesses closed within said mold formed at the distal end of each runner for holding the resin let out from the runner and air pressed out by the resin.
Claim 2
Dependent Claim
105 words
A resin sealing apparatus for use in sealing semiconductor chips with resin comprising: a mold; a pot within said mold in which the resin is injected; cavities within said mold in which the semiconductor chips are set; runners within said mold communicating with the pot and the cavities for leading the resin from the pot to the cavities, each of said runners having a circular cross section and a distal end closed within said mold; and recesses closed within said mold formed at the distal end of each runner for holding the resin let out from the runner and air pressed out by the resin.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said mold is separated into two portions.
References Cited (Backward Citations)
US3659821A
Cited
US3779506A
Cited
US4012025A
Cited
JPS60127112A
Cited
JPS62273814A
Cited
JPS6389319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |