US4564572A
Expired / Lapsed
US
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Process for forming pattern
Assignee: Hitachi Ltd
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Filing: 1985-01-24
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Granted: 1986-01-14
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Expires: 2005-01-24
Abstract
Abstract A process for forming a pattern on the interior side of a face plate of a color picture tube by using a photosensitive composition comprising p-diazo-N,N-dimethylaniline chloride-zinc chloride double salt and a p-diazo-bromophenol chloride-zinc chloride double salt and conducting imagewise exposure of coated film of the photosensitive composition to light and contacting with powder particles at least one time gives higher sensitivity compared with a conventional process.
Inventors
- 👤 Hajime Morishita
- 👤 Kiyoshi Miura
- 👤 Osamu Sasaya
- 👤 Saburo Nonogaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
A process for forming a pattern which comprises (1) a step of coating a photosensitive composition comprising p-diazo-N,N-dimethylaniline chloride-zinc chloride double salt and a p-diazo-bromophenol chloride-zinc chloride double salt of the formula: ##STR6## wherein A is hydrogen or bromine; and n is 1/2 to 1, on the interior side of a face plate of a color picture tube to form a coating film, (2) a step of imagewisely exposing the coating film to light to make the exposed portions sticky, and (3) a step of contacting powder particles with the exposed coating film to adhere the powder particles to the exposed portions.
Claim 2
Dependent Claim
102 words
A process for forming a pattern which comprises (1) a step of coating a photosensitive composition comprising p-diazo-N,N-dimethylaniline chloride-zinc chloride double salt and a p-diazo-bromophenol chloride-zinc chloride double salt of the formula: ##STR6## wherein A is hydrogen or bromine; and n is 1/2 to 1, on the interior side of a face plate of a color picture tube to form a coating film, (2) a step of imagewisely exposing the coating film to light to make the exposed portions sticky, and (3) a step of contacting powder particles with the exposed coating film to adhere the powder particles to the exposed portions.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein the steps (2) and (3) are repeated at least one time.
Claim 4
Dependent Claim
35 words
A process according to claim 1, wherein the double salt of the formula (I) is contained in an amount of 2 to 10% by weight based on the weight of p-diazo-N,N-dimethylaniline chloride-zinc chloride double salt.
Claim 5
Dependent Claim
20 words
A process according to claim 1, wherein the double salt of the formula (I) is p-diazo-2,6-dibromophenol chloride-zinc chloride double salt.
Claim 6
Dependent Claim
20 words
A process according to claim 1, wherein the double salt of the formula (I) is p-diazo-2-bromophenol chloride-zinc chloride double salt.
Claim 7
Dependent Claim
20 words
A process according to claim 1, wherein the double salt of the formula (I) is p-diazo-3,5-dibromophenol chloride-zinc chloride double salt.
Claim 8
Dependent Claim
33 words
A photosensitive composition comprising p-diazo-N, N-dimethylaniline chloride-zinc chloride double salt and a p-azido-bromophenol chloride-zinc chloride double salt of the formula: ##STR7## wherein A is hydrogen or bromine; and n is 1/2 to 1.
Claim 9
Dependent Claim
33 words
A photosensitive composition comprising p-diazo-N, N-dimethylaniline chloride-zinc chloride double salt and a p-azido-bromophenol chloride-zinc chloride double salt of the formula: ##STR7## wherein A is hydrogen or bromine; and n is 1/2 to 1.
Claim 10
Dependent Claim
36 words
A composition according to claim 7, wherein the double salt of the formula (I) is contained in an amount of 2 to 10% by weight based on the weight of p-diazo-N, N-dimethylaniline chloride-zinc chloride double salt.
Claim 11
Dependent Claim
20 words
A composition according to claim 7, wherein the double salt of the formula (I) is p-diazo-2,6-dibromophenol chloride-zinc chloride double salt.
Claim 12
Dependent Claim
20 words
A composition according to claim 7, wherein the double salt of the formula (I) is p-diazo-2-bromophenol chloride-zinc chloride double salt.
Claim 13
Dependent Claim
20 words
A composition according to claim 7, wherein the double salt of the formula (I) is p-diazo-3,5-dibromophenol chloride-zinc chloride double salt.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |