US5002647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of thick films by electrophoresis
Assignee: Mitsubishi Materials Corp
•
Filing: 1989-07-20
•
Granted: 1991-03-26
•
Expires: 2009-07-20
Abstract
Abstract In the process for preparing thick films comprising dispersing powder of a starting material for thick films in a solvent system, applying direct electric potential between the electrodes provided in the solvent system and thus electrodepositing the powder material on a substrate connected to the cathode, an improvement wherein a mixed solvent comprising an alcohol or alcohols, a methyl-group-containing ketone or ketones and nitorcellulose is disclosed. By this process thick films of solid electrolytes can be economically formed.
Inventors
- 👤 Hiroyoshi Tanabe
- 👤 Seitaro Fukushima
- 👤 Etsuji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:44
CPC Classifications
C; C25; C25D; C25D13/00; C25D13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A process for electrophoretically depositing films of zirconia solid electrolyte comprising: (a) dispersing Y 2 O 3 stabilized zirconia powder in a solvent system consisting essentially of 30-50% by volume of one or more alcohols, 50-70% by volume of one or more methyl group-containing ketones and 0.001-0.5% by volume of nitrocellulose; (b) applying direct electric potential between electrodes which are provided in the solvent system, thereby depositing the powder on a substrate connected to the cathode.
Claim 2
Dependent Claim
76 words
A process for electrophoretically depositing films of zirconia solid electrolyte comprising: (a) dispersing Y 2 O 3 stabilized zirconia powder in a solvent system consisting essentially of 30-50% by volume of one or more alcohols, 50-70% by volume of one or more methyl group-containing ketones and 0.001-0.5% by volume of nitrocellulose; (b) applying direct electric potential between electrodes which are provided in the solvent system, thereby depositing the powder on a substrate connected to the cathode.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said alcohols are methyl alcohol and hexyl alcohol.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein said solvent system consists essentially of methyl alcohol, hexyl alcohol, methylisobutyl ketone and nitrocellulose.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein said cathode is an insulator oxide material.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein an electrophoretic deposition is repeated with a different solid electrolyte powder, thereby forming a laminated multilayer film.
References Cited (Backward Citations)
US3770604A
Cited
US4482447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |