US4822639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin coating method and device
Assignee: Fujifilm Holdings Corp
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Filing: 1987-08-21
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Granted: 1989-04-18
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Expires: 2007-08-21
Abstract
Abstract In coating a substrate such as a glass plate with a photo-sensitive coating solution by spin coating, the substrate is tilted so that the coating solution flows down the substrate to cover the entire surface of the latter, and then the substrate is held horizontal, and rotated so that a layer of coating solution uniform in thickness is formed on the substrate.
Inventors
- 👤 Itsuo Fujii
- 👤 Toshikazu Sato
- 👤 Kazuharu Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/162; B; B05; B05C; B05C11/00; B05C11/02; B05C11/08; C; C03; C03C; C03C17/00; C03C17/001; C03C17/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A spin coating method, comprising the steps of: supplying a coating solution to a periphary of substrate tilted with respect to a horizontal place, whereby said coating solution flows across said substrate and then; holding said substrate, including said flowed coating solution, parallel to said horizontal plane; and then rotating said substrate, while parallel to said horizontal plane, about a vertical axis perpendicular to said horizontal plane for distributing said coating solution over said substrate.
Claim 2
Dependent Claim
75 words
A spin coating method, comprising the steps of: supplying a coating solution to a periphary of substrate tilted with respect to a horizontal place, whereby said coating solution flows across said substrate and then; holding said substrate, including said flowed coating solution, parallel to said horizontal plane; and then rotating said substrate, while parallel to said horizontal plane, about a vertical axis perpendicular to said horizontal plane for distributing said coating solution over said substrate.
Claim 3
Dependent Claim
28 words
A spin coating method as recited in claim 1, wherein said substrate is tilted at an angle of from 3° to 5° with respect to said horizontal plane.
Claim 4
Dependent Claim
94 words
A spin coating device, comprising: a turntable for supporting a substrate coated with a coating solution; means for moving between a first position in which the turntable is in a horizontal plane and a second position in which the turntable is tilted at an angle to the horizontal plane; and a vertical rotary shaft for rotating said turntable and means for coating a substrate comprising a single nozzle disposed above a periphery of the turntable while it is in the second position on the turntable with a coating solution by the action of gravity.
Claim 5
Dependent Claim
94 words
A spin coating device, comprising: a turntable for supporting a substrate coated with a coating solution; means for moving between a first position in which the turntable is in a horizontal plane and a second position in which the turntable is tilted at an angle to the horizontal plane; and a vertical rotary shaft for rotating said turntable and means for coating a substrate comprising a single nozzle disposed above a periphery of the turntable while it is in the second position on the turntable with a coating solution by the action of gravity.
Claim 6
Dependent Claim
24 words
A spin coating device as recited in claim 3, wherein said moving means tilts said turntable through an angle of from 3° to 5°.
Claim 7
Dependent Claim
20 words
A spin coating device as recited in claim 3, where said moving means tilts said turntable supporting thereon said substrate.
Claim 8
Dependent Claim
24 words
A spin coating device as recited in claim 5, wherein said moving means tilts said turntable through an angle of from 3° to 5°.
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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |