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US5348839A
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Photodelineable coatings from hydrogen silsesquioxane resin
Assignee: Dow Silicones Corp
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Filing: 1993-03-22
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Granted: 1994-09-20
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Expires: 2013-03-22
Abstract
Abstract Disclosed are compositions which are useful for forming photodelineable coatings on substrates. The compositions contain a solvent, hydrogen silsesquioxane resin and an initiator which generates free radicals upon exposure to radiation.
Inventors
- 👤 Loren A. Haluska
- 👤 Keith W. Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:34
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/004; G03F7/075; G03F7/0757
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
A liquid composition comprising a solvent, hydrogen silsesquioxane resin and an initiator which generates free radicals upon exposure to radiation.
Claim 2
Dependent Claim
20 words
A liquid composition comprising a solvent, hydrogen silsesquioxane resin and an initiator which generates free radicals upon exposure to radiation.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the initiator is dodecamethyl cyclohexasilane.
Claim 4
Dependent Claim
24 words
The composition of claim 1 which contains between about 0.1 and about 50 weight percent solids of hydrogen silsesquioxane and initiator in the solvent.
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein the solvent is selected from the group consisting of aromatic hydrocarbons, alkanes, ketones, esters, cyclic dimethylpolysiloxanes and glycol ethers.
Claim 6
Dependent Claim
35 words
The composition of claim 1 wherein the initiator is present in the range of about 0.01 moles initiator per each (HSiO 3/2 ) unit to about 1 mole initiator per each (HSiO 3/2 ) unit.
Claim 7
Dependent Claim
24 words
The composition of claim 1 wherein the initiator is a material containing Si--Si bonds which are activated by radiation to form volatile SiH compounds.
Claim 8
Dependent Claim
25 words
The composition of claim 1 wherein the initiator is selected from the group consisting of peroxides, benzophenones, acetophenones, azodi (1,1-hexahydrobenzonitrile); azobisisobutyronitrile, and alpha,alpha-bis tertiary peroxydiisopropylbenzene.
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) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |