US5387480A
Expired / Lapsed
US
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High dielectric constant coatings
Assignee: Dow Silicones Corp
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Filing: 1993-08-09
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Granted: 1995-02-07
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Expires: 2013-08-09
Abstract
Abstract Disclosed is a method of forming high dielectric constant coatings on substrates. The method comprises applying a coating of hydrogen silsesquioxane resin and a high dielectric constant filler onto a substrate and heating the coated substrate at a temperature sufficient to convert the hydrogen silsesquioxane resin to a silica containing ceramic matrix containing the filler.
Inventors
- 👤 Loren A. Haluska
- 👤 Keith W. Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:51
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C03; C03C; C03C17/00; C03C17/006; C03C17/007; C03C17/008; C03C17/009; C03C17/34; C03C17/3411; C03C17/3417; C03C17/3429; C03C17/3435; C03C17/3441; C04B41/009; C04B41/45; C04B41/50; C04B41/5025; C04B41/5035; C09; C09D; C09D183/00; C09D183/04; C09K; C09K11/00; C09K11/02; C09K11/08; C14; C14C; C14C11/00; C23; C23C; C23C18/00; C23C18/02; C23C18/12; C23C18/1204; C23C18/1208; C23C18/1212; C23C18/122; C23C18/1225; C23C18/125; C23C18/1262; C23C18/127; C23C18/1279; H; H10; H10D; H10D89/00; H10W; H10W42/00; H10W42/40; C03C2217/00; C03C2217/40; C03C2217/43; C03C2217/44; C03C2217/45; C03C2217/46; C03C2217/465; C03C2217/47; C03C2217/475; C03C2217/479; C04B2111/00; C04B2111/00474; C04B2111/00844; C04B2111/80; C04B2111/90; C04B2111/94
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
74 words
A method of forming a coating with a dielectric constant of at least 8 on a substrate comprising: applying a coating composition comprising hydrogen silsesquioxane resin and about 5 to about 90 weight percent of a filler having a dielectric constant of at least 8 onto a substrate; and heating the coated substrate at a temperature sufficient to convert the coating composition into a ceramic coating having a dielectric constant of at least 8.
Claim 2
Independent Claim
74 words
A method of forming a coating with a dielectric constant of at least 8 on a substrate comprising: applying a coating composition comprising hydrogen silsesquioxane resin and about 5 to about 90 weight percent of a filler having a dielectric constant of at least 8 onto a substrate; and heating the coated substrate at a temperature sufficient to convert the coating composition into a ceramic coating having a dielectric constant of at least 8.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein the coating composition is applied to the substrate by a process which comprises coating the substrate with a liquid mixture comprising a solvent, the hydrogen silsesquioxane resin and the filler and then evaporating the solvent.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein the coated substrate is heated at a temperature in the range of between about 50° C. and about 800° C. for less than about 3 hours.
Claim 5
Dependent Claim
31 words
The method of claim 1 wherein the hydrogen silsesquioxane resin is fractionated such that at least 75% of the polymeric species have a molecular weight between about 1200 and about 100,000.
Claim 6
Dependent Claim
76 words
The method of claim 1 wherein the coating composition also contains modifying ceramic oxide precursors comprising a compound containing an element selected from the group consisting of titanium, zirconium, aluminum, tantalum, vanadium, niobium, boron and phosphorous wherein the compound contains at least one hydrolyzable substituent selected from the group consisting of alkoxy or acyloxy and the compound is present in an amount such that the coating contains 0.1 to 30 percent by weight modifying ceramic oxide.
Claim 7
Dependent Claim
40 words
The method of claim 1 wherein the coating composition also contains a platinum, rhodium or copper catalyst in an amount of between about 5 and about 500 ppm platinum, rhodium or copper based on the weight of hydrogen silsesquioxane resin.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein the coating composition also contains a material which modifies the surface of the filler.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the coating composition also contains a suspending agent.
Claim 10
Dependent Claim
22 words
The method of claim 1 wherein the filler is in a form selected from the group consisting of powders, particles, and flakes.
Claim 11
Dependent Claim
18 words
The method of claim 1 wherein the filler is a titanate, niobate or tungstate salt of a metal.
Claim 12
Dependent Claim
29 words
The method of claim 1 wherein the filler is selected from the group consisting of titanate, niobate or tungstate salts of strontium, zirconium, barium, lead, iron, zinc, and magnesium.
Claim 13
Dependent Claim
22 words
The method of claim 1 wherein the filler is selected from the group consisting of tantalum oxide, titanium oxide and niobium oxide.
Claim 14
Dependent Claim
9 words
The substrate coated by the method of claim 1.
Claim 15
Dependent Claim
30 words
A coating composition comprising hydrogen silsesquioxane resin and about 5 to about 90 weight percent of a filler having a dielectric constant of at least 8 diluted in a solvent.
Claim 16
Dependent Claim
30 words
A coating composition comprising hydrogen silsesquioxane resin and about 5 to about 90 weight percent of a filler having a dielectric constant of at least 8 diluted in a solvent.
Claim 17
Dependent Claim
18 words
The composition of claim 14 wherein the filler is a titanate, niobate or tungstate salt of a metal.
Claim 18
Dependent Claim
29 words
The composition of claim 14 wherein the filler is selected from the group consisting of titanate, niobate or tungstate salts of strontium, zirconium, barium, lead, iron, zinc, and magnesium.
Claim 19
Dependent Claim
22 words
The composition of claim 14 wherein the filler is selected from the group consisting of tantalum oxide, titanium oxide and niobium oxide.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |