US4631103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for peeling protective film off a thin article
Assignee: NITTO ELECTRO INDUSTRIAL Co Ltd
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Filing: 1984-06-29
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Granted: 1986-12-23
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Expires: 2004-06-29
Abstract
Abstract A process for peeling a protective film off a thin article such as a silicon wafer is proposed. The film is peeled by sticking an adhesive tape to the protective film on the article and pulling it away from the article. The protective film is peeled only by the adhesive force of the adhesive tape.
Inventors
- 👤 Minoru Ametani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:25
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0442; B; B29; B29C; B29C63/00; B29C63/0004; B29C63/0013; H10P72/70; H10P72/74; H10P72/7402; H10W; H10W74/00; H10W74/01; H10P72/7416; H10P72/744; H10P72/7442; H10P72/7446; Y; Y10; Y10S; Y10S156/00; Y10S156/934; Y10S156/941; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/19; Y10T156/1906
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
Process for peeling a protective adhesive film stuck to substantially the entire surface of one side of a thin article such as a silicon wafer, comprising: (a) feeding a web of adhesive tape, having an adhesive surface, from a source of supply to a position above the protective film with the adhesive surface facing the protective film; (b) adhering said tape to substantially the entire surface of said protective film while adhered to the article; (c) applying a holding force to said article; to hold the article stationary (d) while holding said article stationary, peeling said protective film off the article by the adhesive force of said adhesive tape acting on the protective film while taking up said adhesive tape; and said protective film and (e) said taking up of said adhesive tape being started some time after the peeling of the adhesive tape and the protective film from said article has been started.
Claim 2
Dependent Claim
154 words
Process for peeling a protective adhesive film stuck to substantially the entire surface of one side of a thin article such as a silicon wafer, comprising: (a) feeding a web of adhesive tape, having an adhesive surface, from a source of supply to a position above the protective film with the adhesive surface facing the protective film; (b) adhering said tape to substantially the entire surface of said protective film while adhered to the article; (c) applying a holding force to said article; to hold the article stationary (d) while holding said article stationary, peeling said protective film off the article by the adhesive force of said adhesive tape acting on the protective film while taking up said adhesive tape; and said protective film and (e) said taking up of said adhesive tape being started some time after the peeling of the adhesive tape and the protective film from said article has been started.
Claim 3
Dependent Claim
29 words
The process as claimed in claim 1, wherein said adhesive tape is stuck to said protective film on the article by pressing said adhesive tape against said protective film.
Claim 4
Dependent Claim
32 words
The process as claimed in claim 1, wherein the article is held down in position by suction force while said adhesive tape and said protective film are being peeled off the article.
Claim 5
Dependent Claim
48 words
Process for peeling a protective adhesive film as claimed in claim 1, when said adhesive tape and protective coating are peeled from said article while it is being held stationary by a moving force disposed above the article and moving back away from leading edge of the article.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |