Compositions – Electrically conductive or emissive compositions – Elemental carbon containing
Reexamination Certificate
2007-10-26
2011-10-25
Mc Ginty, Douglas (Department: 1765)
Compositions
Electrically conductive or emissive compositions
Elemental carbon containing
C423S446000
Reexamination Certificate
active
08043533
ABSTRACT:
The present invention is to provide a diamond sintered compact having good conductivity together with the characteristics, such as hardness, thermal conductivity, thermal resistance, chemical stability, almost equal to those of a natural diamond. A boron-doped diamond sintered compact having good conductivity and high thermal resistance is produced by a sintering process, in which 90 to 99.9 wt. % of a boron-doped diamond powder and 0.1 to 10% wt. % of a powder comprising, one or more of carbonates including Mg, Ca, Sr or Ba, and/or one or more of composite carbonates composed by two or more of these elements, as a bonding phase component, are sintered together under Ht/HP conditions, and the bonding phase component melts and then fills into the space between the boron-doped diamond powder particles.
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European Search Report mailed Mar. 3, 2011 for the corresponding European patent application No. 07830622.2.
Fukunaga Osamu
Tajima Itsuro
Wardoyo Akhmadi Eko
Ginty Douglas Mc
Leason Ellis LLP
Mitsubishi Materials Corporation
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