US4024596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning slices of material
Assignee: Motorola Solutions Inc
•
Filing: 1975-11-05
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Granted: 1977-05-24
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Expires: 1995-11-05
Abstract
Abstract Both sides of thin slices of material are cleaned simultaneously in the apparatus of this invention. A slice of material rotates about its axis as it passes between opposed rotatable cleaning surfaces. The apparatus includes a stop which maintains the slice of material off-center with respect to the cleaning surfaces. The apparatus is particularly useful for cleaning slices of semiconductor material.
Inventors
- 👤 Philip Joseph Rioux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:50
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0402; H10P72/0406; H10P72/0411; H10P72/0412; B; B08; B08B; B08B1/00; B08B1/30; B08B1/32; B08B1/34
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
Apparatus for cleaning a slice of material comprising: opposed rotatable cleaning surfaces for engaging opposite faces of the slice and for rotating said slice; and stop means engaging the periphery of said slice so that at least one of said surfaces engages said slice at a face portion comprising one but not both extremities of a chord the slice off-center with respect to said opposed rotatable cleaning surfaces.
Claim 2
Dependent Claim
68 words
Apparatus for cleaning a slice of material comprising: opposed rotatable cleaning surfaces for engaging opposite faces of the slice and for rotating said slice; and stop means engaging the periphery of said slice so that at least one of said surfaces engages said slice at a face portion comprising one but not both extremities of a chord the slice off-center with respect to said opposed rotatable cleaning surfaces.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 further including means for moving the slice into engagement with said cleaning surfaces.
Claim 4
Dependent Claim
47 words
The apparatus of claim 2 wherein said means for moving the slice is located at a first position on one side of said opposed rotatable cleaning surfaces, and said stop means is located at a second position on the opposite side of said opposed rotatable cleaning surfaces.
Claim 5
Dependent Claim
38 words
The apparatus of claim 3 wherein said stop means comprises a member having a shaped portion corresponding to the configuration of a portion of the perimeter of said slice, said shaped portion being adapted to engage said slice.
Claim 6
Dependent Claim
26 words
The apparatus of claim 4 wherein sad stop means comprises segments separable to permit said slice to be discharged from said apparatus through said stop means.
Claim 7
Dependent Claim
31 words
The apparatus of claim 4 wherein said stop means is designed for engagement with a circular slice, and said shaped portion has a circumference corresponding to the circumference of the slice.
Claim 8
Dependent Claim
30 words
The apparatus of claim 4 further including a housing surrounding at least a portion of one of said opposed rotatable cleaning surfaces and forming a support for said stop means.
Claim 9
Dependent Claim
27 words
The apparatus of claim 7 wherein said housing includes means for applying a cleaning solution to the area of engagement of the cleaning surfaces with the slice.
Claim 10
Dependent Claim
14 words
The apparatus of claim 1 wherein said opposed rotatable cleaning surfaces comprise cylindrical members.
Claim 11
Dependent Claim
22 words
The apparatus of claim 9 wherein said cylindrical members are positioned to have coplanar but non-parallel axes with respect to each other.
Claim 12
Dependent Claim
11 words
The apparatus of claim 9 wherein said cylindrical members are cantilevered.
Claim 13
Independent Claim
54 words
A method for cleaning a slice of material which comprises: passing said slice between opposed cylindrical cleaning members rotating in directions opposite to each other; and maintaining said slice so that at least one of said rotating members engages said slice at a face portion comprising one but not both extremities of a chord.
Claim 14
Independent Claim
54 words
A method for cleaning a slice of material which comprises: passing said slice between opposed cylindrical cleaning members rotating in directions opposite to each other; and maintaining said slice so that at least one of said rotating members engages said slice at a face portion comprising one but not both extremities of a chord.
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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |