Patent US3816175A successfully refreshed from Google Patents.
US4853286A
Expired / Lapsed
US
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Wafer processing film
Assignee: Mitsui Chemicals Inc
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Filing: 1985-05-23
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Granted: 1989-08-01
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Expires: 2005-05-23
Abstract
Abstract PCT No. PCT/JP85/00284 Sec. 371 Date Jan. 16, 1986 Sec. 102(e) Date Jan. 16, 1986 PCT Filed May 23, 1985 PCT Pub. No. WO85/05734 PCT Pub. Date Dec. 19, 1985.This invention provides a wafer processing film comprising a base film having a Shore D hardness of 40 or less and an adhesive layer disposed on one surface of the base film. In grinding the surfaces of wafers such as silicon and similar wafers, breakage can be prevented by affixing the wafers to the adhesive layer of the processing film and then grinding them.
Inventors
- 👤 Osamu Narimatsu
- 👤 Michiyasu Ito
- 👤 Kazuyoshi Komatsu
- 👤 Yasuhiro Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:15
CPC Classifications
H; H10; H10P; H10P52/00; H10P90/00; H10P90/12; H10P90/123; B; B24; B24B; B24B37/00; B24B37/27; B24B37/30; C; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; H10P72/00; H10P72/70; H10P72/74; H10P72/7402; H10P72/7416; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/1462; Y10T428/28; Y10T428/31504; Y10T428/31652; Y10T428/31667
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A wafer processing film comprising a base film having a Shore D harness of 40 or less, an adhesive layer disposed on one surface of said base film, said adhesive layer including an additive which is selected from the group consisting of nonionic surface active agents and ethylene glycol derivaties, and a supporting film having a Shore D hardness greater than 40 being laminated to the surface of said base film, said supporting film having no adhesive layer disposed thereon.
Claim 2
Dependent Claim
80 words
A wafer processing film comprising a base film having a Shore D harness of 40 or less, an adhesive layer disposed on one surface of said base film, said adhesive layer including an additive which is selected from the group consisting of nonionic surface active agents and ethylene glycol derivaties, and a supporting film having a Shore D hardness greater than 40 being laminated to the surface of said base film, said supporting film having no adhesive layer disposed thereon.
Claim 3
Dependent Claim
22 words
A processing film as claimed in claim 1 wherein said ethylene glycol derivatives have a boiling point of 100° C. or above.
Claim 4
Dependent Claim
30 words
A water processing film as claimed in claim 1 wherein said adhesive layer is selected from the group consisting of acrylic adhesives, ester adhesives, urethane adhesives and synthetic rubber adhesives.
Claim 5
Dependent Claim
25 words
A wafer processing film as claimed in claim 1 wherein said base film is selected from the group consisting of thermoplastic resins and synthetic rubbers.
Claim 6
Dependent Claim
27 words
A wafer processing film as claimed in claim 4 wherein said thermoplastic resin is selected from the group consisting of ethylene-vinyl acetate copolymer resin and butadiene rubber.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |