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US4568407A
Expired / Lapsed
US
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Equipment for coating and flush cutting of a protective plastics film of silicon slices for final lapping
Assignee: STMicroelectronics SRL
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Filing: 1984-05-30
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Granted: 1986-02-04
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Expires: 2004-05-30
Abstract
Abstract An equipment for coating and flush cutting of a protective plastics film of silicon slices for final lapping comprises a plate provided with a plurality of seats, each of which intended to exactly contain a slice, a carriage movable along said plate and carrying a roll of said plastics film, and a pressure roller for spreading out said film on said plate and slices accomodated in the respective seats, as well as a trimming device comprising a vertical shaft electric motor and an arm integral with said shaft and carrying a heated circular blade.
Inventors
- 👤 Giuseppe Barbieri
- 👤 Giancesare Caprotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:50
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0441; B; B26; B26F; B26F1/00; B26F1/38; B26F1/3846; B29; B29C; B29C63/00; B29C63/02; B29C63/024; H10P50/00; B29C2793/00; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1343; Y10T156/1348; Y10T156/17; Y10T156/1788; Y10T156/1795; Y10T156/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
An apparatus for laminating and flush cutting of a protective plastic film on silicon slices or wafers, said apparatus comprising a plate provided with a plurality of seats, each of which is sized to receive a slice or wafer, a carriage movable along said plate and carrying a roll of said plastic film, and a pressure roller for spreading out said film on said plate and slices or wafers accommodated in the respective seats, and a trimming device comprising a shaft, an electric motor for driving the shaft and an arm coupled with said shaft and carrying a heated circular blade.
Claim 2
Independent Claim
101 words
An apparatus for laminating and flush cutting of a protective plastic film on silicon slices or wafers, said apparatus comprising a plate provided with a plurality of seats, each of which is sized to receive a slice or wafer, a carriage movable along said plate and carrying a roll of said plastic film, and a pressure roller for spreading out said film on said plate and slices or wafers accommodated in the respective seats, and a trimming device comprising a shaft, an electric motor for driving the shaft and an arm coupled with said shaft and carrying a heated circular blade.
Claim 3
Dependent Claim
55 words
An apparatus as claimed in claim 1, wherein said arm of the trimming device has associated therewith a cam having the same profile as that of said seats, and wherein that said trimming device comprise means for correct positioning thereof with respect to each seat, said heated circular blade confronting the edge of said seats.
Claim 4
Dependent Claim
45 words
An apparatus as claimed in claim 2, wherein said means for correct positioning of the trimming device with respect to the seats comprise holes in said plate circumferentially arranged about each seat, and feet disposed on said trimming device arranged to cooperate with said holes.
Claim 5
Dependent Claim
43 words
An apparatus as claimed in claim 3, further comprising a roller disposed on the arm of the trimming device opposite the heated circular blade, said roller acting as a resisting and pressing member for the film portion adjacent the periphery of the seats.
Claim 6
Dependent Claim
29 words
An apparatus as claimed in claim 4, wherein said heated circular blade and resisting roller are mounted on said arm through the interposition of means controlled by said cam.
Claim 7
Dependent Claim
39 words
An apparatus as claimed in claim 2, wherein said arm is elongated and wherein said heated circular blade is axially movably mounted on said arm, the axial position of said blade on said arm being controlled by said cam.
Claim 8
Dependent Claim
43 words
An apparatus as claimed in claim 2, further comprising a roller mounted on the arm of the trimming device opposite the heated circular blade, said roller acting as a resisting and pressing member for the film portion adjacent the periphery of the seats.
Claim 9
Dependent Claim
30 words
An apparatus as claimed in claim 7, characterized in that said heated circular blade and roller are mounted on said arm through the interposition of means controlled by said cam.
Claim 10
Dependent Claim
45 words
An apparatus as claimed in claim 2, wherein said means for correct positioning of the trimming device with respect to the seats comprise holes in said plate circumferentially arranged about each seat, and feet disposed on said trimming device arranged to cooperate with said holes.
Claim 11
Dependent Claim
43 words
An apparatus as claimed in claim 9, further comprising a roller mounted on the arm of the trimming device opposite the heated circular blade, said roller acting as a resisting and pressing member for the film portion adjacent the periphery of the seats.
Claim 12
Dependent Claim
28 words
An apparatus as claimed in claim 10, wherein said heated circular blade and roller are mounted on said arm through the interposition of means controlled by said cam.
References Cited (Backward Citations)
US3971691A
Cited
US4385956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |