US4933219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive tapes for die bonding
Assignee: Tomoegawa Co Ltd
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Filing: 1989-03-20
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Granted: 1990-06-12
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Expires: 2009-03-20
Abstract
Abstract An adhesive tape for die bonding is disclosed, comprising a continuous tape wound on a reel, the continuous tape having a structure that an adhesive layer composed mainly of a filler and a binder comprised of an epoxy resin and a polyester resin is laminated on a release film. According to the adhesive tape for die bonding of the invention, bonding of semiconductor elements can be attained with good workability and high reliability by very easily handling of the adhesive tape.
Inventors
- 👤 Yukinori Sakumoto
- 👤 Atsushi Koshimura
- 👤 Hiroshi Matsushita
- 👤 Masaki Tsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:48
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/30; C09J7/35; H; H10; H10P; H10P72/00; H10P72/70; H10P72/74; H10P72/7402; H10W; H10W72/00; H10W72/01; H10W72/013; H10W72/30; H10P72/7416; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/321; H10W72/325; H10W72/351; H10W72/353; H10W72/354; H10W90/00; H10W90/701; H10W90/731; H10W90/736; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/14; Y10T428/1476; Y10T428/28; Y10T428/2852; Y10T428/287
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
An adhesive tape for die bonding which comprises an adhesive layer laminated on a surface of a release film, wherein said adhesive layer is composed mainly of a filler by weight and a binder comprising: (a) a mixture of a novolak resin and a bisphenol A epoxy resin and (b) a polyester resin with a glass transition temperature of 30° or lower, Sakumoto et al., Serial No. 07/325,090 wherein said adhesive tape is a continuous tape wound on a reel.
Claim 2
Dependent Claim
80 words
An adhesive tape for die bonding which comprises an adhesive layer laminated on a surface of a release film, wherein said adhesive layer is composed mainly of a filler by weight and a binder comprising: (a) a mixture of a novolak resin and a bisphenol A epoxy resin and (b) a polyester resin with a glass transition temperature of 30° or lower, Sakumoto et al., Serial No. 07/325,090 wherein said adhesive tape is a continuous tape wound on a reel.
Claim 3
Dependent Claim
35 words
An adhesive tape according to claim 1, wherein the proportion of said polyester resin in said binder is from 20 to 100 parts by weight, based on 100 parts by weight of said epoxy resin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |