Patent US4924800A successfully refreshed from Google Patents.
US4924800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for applying photo-resist to substrate
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1989-01-09
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Granted: 1990-05-15
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Expires: 2009-01-09
Abstract
Abstract Disclosed are improved method and apparatus by which the adhesion of a photo-resist applied onto a wafer substrate can be improved when using an adhesion reinforcing agent in combination. The method of applying a photo-resist according to the present invention comprises a steps of washing the substrate, a step of drying said substrate, a step of feeding an adhesion reinforcing agent to said substrate while heating it to a prescribed temperature, a step of carrying out additional heating in the state that the adhesion reinforcing agent is stopped from being fed to said substrate, a stop of cooling said substrate to a room temperature, and a step of coating the surface of said substrate with the photo-resist.
Inventors
- 👤 Masato Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
H; H05; H05K; H05K3/00; G; G03; G03F; G03F7/00; G03F7/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
An apparatus for applying a photo-resist to the surface of a substrate to be treated comprising: (i) conveyor means for conveying said substrate, (ii) adhesion reinforcing agent feeding means, for feeding an adhesion reinforcing agent to said substrate, comprising a treatment chamber enclosing a portion of said conveyor feeding pipe for feeding said adhesion reinforcing agent to said treatment chamber, distributor means having a plurality of minute holes provided therein opposite to the substrate in said treatment chamber and being connected with said feeding pipe, an auxiliary chamber provided on the periphery of said treatment chamber and being connected to exhaust means for exhausting gases, and heating means for heating said substrate, (iii) additional heating means, provided at a stage posterior to said adhesion reinforcing agent feeding means, for further heating said substrate, and (iv) photo-resist feeding means, provided at a stage posterior to said additional heating means, for feeding the photo-resist to the surface of said substrate.
Claim 2
Independent Claim
158 words
An apparatus for applying a photo-resist to the surface of a substrate to be treated comprising: (i) conveyor means for conveying said substrate, (ii) adhesion reinforcing agent feeding means, for feeding an adhesion reinforcing agent to said substrate, comprising a treatment chamber enclosing a portion of said conveyor feeding pipe for feeding said adhesion reinforcing agent to said treatment chamber, distributor means having a plurality of minute holes provided therein opposite to the substrate in said treatment chamber and being connected with said feeding pipe, an auxiliary chamber provided on the periphery of said treatment chamber and being connected to exhaust means for exhausting gases, and heating means for heating said substrate, (iii) additional heating means, provided at a stage posterior to said adhesion reinforcing agent feeding means, for further heating said substrate, and (iv) photo-resist feeding means, provided at a stage posterior to said additional heating means, for feeding the photo-resist to the surface of said substrate.
Claim 3
Dependent Claim
25 words
The apparatus for applying a photo-resist according to claim 1, wherein said adhesion reinforcing agent feeding means and said additional heating means are provided integrally.
Claim 4
Dependent Claim
31 words
The apparatus for applying a photo-resist according to claim 1, further comprising cooling means, provided at a stage posterior to said additional heating means, for cooling said substrate to room temperature.
Claim 5
Dependent Claim
42 words
The apparatus for applying a photo-resist according to claim 3, wherein at least one of ultraviolet irradiation means and ozone feeding means is provided at a stage anterior to the adhesion reinforcing agent feeding means to clean the surface of said substrate.
Claim 6
Dependent Claim
35 words
The apparatus for applying a photo-resist according to claim 1, wherein said additional heating means comprises a chamber enclosing a peripheral area of the substrate and exhaust means connected to said chamber for exhausting gases.
Claim 7
Dependent Claim
42 words
The apparatus for applying a photo-resist according to claim 5, wherein at least one of ultraviolet irradiation means and ozone feeding means is provided at a stage anterior to the adhesion reinforcing agent feeding means to clean the surface of said substrate.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |