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US 5,203,936 AGranted
Clean burning green ceramic tape cast system using polyisobutylene binder
AssigneeW. R. Grace & Co.-Conn.
InventorsLeonard E. Dolhert, James D. Idol, Jr.
Life of this patent
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Abstract
Green ceramic formulations comprising a polyisobutylene binder are suitable for tape casting and can be effectively removed during thermal processing in reducing atmospheres. The binder may be removed in substantially dry reducing atmosphere. The tapes may be used for forming ceramic substrates and metallized ceramics such as those used in electronic packaging.
Claims12
A method of forming a dense ceramic article, said method comprising:
- a) forming a slip consisting essentially of ceramic particles, a dispersant, a plasticizer, a solvent, and a polyisobutylene binder,
- b) casting said slip onto a sheet to form a tape,
- c) recovering said tape from said sheet, and
- d) heating said tape in a reducing atmosphere to remove said binder and densify said ceramic.
1 more element
A method of forming a dense cermic, said method comprising:
- a) forming a slip consisting essentially of ceramic particles, a dispersant, a plasticizer, a solvent and a polyisobutylene binder,
- b) casting said slip onto a sheet to forma tape,
- c) recovering said tape from said sheet,
- d) laminating said tape with other layers of green ceramic tape, and
- e) heating said tape laminate in a reducing atmosphere to remove said binder and densify said ceramic.
2 more elements
Dependencies are inferred from the claim text.