US4795582A
Expired / Lapsed
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Surface treating composition for micro processing
Assignee: Stella Chemifa Corp
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Filing: 1987-09-21
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Granted: 1989-01-03
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Expires: 2007-09-21
Abstract
Abstract A surface treating composition for micro processing which comprises a mixture of hydrofluoric acid, ammonium fluoride solution and water, and at least one compound selected from the group of surfactants consisting of aliphatic carboxylic acids, salts of aliphatic carboxylic acids, aliphatic amines and aliphatic alcohols.
Inventors
- 👤 Tadahiro Ohmi
- 👤 Nobuhiro Miki
- 👤 Hirohisa Kikuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:16
CPC Classifications
H; H10; H10P; H10P50/00; H10P50/20; H10P50/28; H10P50/282; C; C09; C09K; C09K13/00; C09K13/04; C09K13/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A surface treating composition for micro processing comprising a mixture of hydrofluoric acid, ammonium fluoride solution and water, and at least one compound selected from the group of surfactants consisting of an aliphatic carboxylic acid, a salt of aliphatic carboxylic acid, an aliphatic amine and an aliphatic alcohol represented by the formula C n H 2n+1 OH where n is an integer of from 6 to 12.
Claim 2
Dependent Claim
67 words
A surface treating composition for micro processing comprising a mixture of hydrofluoric acid, ammonium fluoride solution and water, and at least one compound selected from the group of surfactants consisting of an aliphatic carboxylic acid, a salt of aliphatic carboxylic acid, an aliphatic amine and an aliphatic alcohol represented by the formula C n H 2n+1 OH where n is an integer of from 6 to 12.
Claim 3
Dependent Claim
38 words
A composition as defined in claim 1 wherein the surfactant is said aliphatic carboxylic acid which is a compound represented by the formula C n H n+1 COOH wherein n is an integer of from 5 to 11.
Claim 4
Dependent Claim
54 words
A composition as defined in claim 1 wherein the surfactant is said salt of aliphatic carboxylic acid which is a compound represented by the formula C n H n+1 COONH 3 R wherein n is an integer of from 5 to 11, and R is hydrogen or alkyl having 5 to 10 carbon atoms.
Claim 5
Dependent Claim
38 words
A composition as defined in claim 1 wherein the surfactant is said aliphatic amine which is a compound represented by the formula C m H 2m+1 NH 2 wherein m is an integer of from 7 to 14.
Claim 6
Dependent Claim
30 words
A composition as defined in claim 1, which contains 0.1 to 10% by weight of hydrogen fluoride (HF) and 15 to 40% by weight of ammonium fluoride (NH 4 F).
Claim 7
Dependent Claim
27 words
A composition as defined in claim 1 which contains the surfactant(s) in a combined amount of 10 to 10,000 ppm based on the weight of the composition.
References Cited (Backward Citations)
US4040897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |