Compositions – Electrically conductive or emissive compositions
Reexamination Certificate
2006-11-07
2006-11-07
McGinty, Douglas (Department: 1751)
Compositions
Electrically conductive or emissive compositions
C252S518100, C252S519100, C501S092000, C501S096500, C501S097400, C501S098100, C264S404000, C264S668000
Reexamination Certificate
active
07132061
ABSTRACT:
A conductive silicon nitride composite sintered body having an average grain size of 100 nm or less and whose relative roughness (Ra) after electric discharge machining is 0.3 μm or less can be obtained by grinding/mixing a silicon nitride powder and a metal powder together until the average particle size of the silicon nitride powder becomes 30 nm or less, and subsequently by molding and sintering. It is preferable that the crushing/mixing is continued until it is apparent that a peak of added metal in an X-ray diffraction pattern has disappeared during the crushing/mixing.
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McDermott Will & Emery LLP
McGinty Douglas
Sumitomo Electric Industries Ltd.
Vijayakumar Kallambella
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