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US 12,010,793 B2Granted
Ceramic circuit board, ceramic green sheet for ceramic circuit board, and glass ceramic powder for ceramic circuit board
AssigneeNippon Electric Glass Co., Ltd.
InventorsHiroaki Hara, Shuji Nakazawa
Life of this patent
Estimating the term…
Abstract
A ceramic circuit board includes: a ceramic board; and an internal conductor disposed in the ceramic board, in which the ceramic board contains glass, a willemite filler, and an alumina filler, and an average particle diameter of the willemite filler is larger than an average particle diameter of the alumina filler.
Claims8
A ceramic circuit board comprising:
- a ceramic board;
- and
- an internal conductor disposed in the ceramic board,
- wherein the ceramic board contains glass, a willemite filler, and an alumina filler,
- an average particle diameter of the willemite filler is larger than an average particle diameter of the alumina filler, and
- a thermal expansion coefficient of the ceramic board is 4 ppm/° C. or less in a temperature range of −40° C. to +125° C.
3 more elements
A ceramic green sheet for a ceramic circuit board comprising:
- in terms of mass %,
- 30% to 65% of a glass powder;
- 14% to 34% of a willemite filler;
- and
- 7% to 42% of an alumina filler,
- wherein an average particle diameter of the willemite filler is larger than an average particle diameter of the alumina filler.
3 more elements
A glass ceramic powder for a ceramic circuit board comprising:
- in terms of mass %,
- 30% to 65% of a glass powder;
- 14% to 34% of a willemite filler;
- and
- 7% to 42% of an alumina filler,
- wherein an average particle diameter of the willemite filler is larger than an average particle diameter of the alumina filler.
3 more elements
Dependencies are inferred from the claim text.