Chemistry of inorganic compounds – Nitrogen or compound thereof – Binary compound
Reexamination Certificate
2011-01-11
2011-01-11
Mayes, Melvin C (Department: 1793)
Chemistry of inorganic compounds
Nitrogen or compound thereof
Binary compound
C428S698000, C428S457000, C257S292000, C427S377000, C117S088000, C501S098400
Reexamination Certificate
active
07867466
ABSTRACT:
Means for a thermally conductive and electrically insulating material1containing an AlN crystal150mainly comprising AlN, and a production method thereof. In production, a molten aluminum layer is formed on an AlN substrate11with at least its surface comprising AlN in an atmosphere of a non-oxidizing gas, and the molten aluminum layer is then heated in an atmosphere of N2gas to form an AlN crystal150which mainly comprises an AlN layer125. The means are also a thermally conductive and electrically insulating material having an AlN crystal and an Al gradient layer, and a production method thereof. In production, a heating step of forming a molten aluminum layer15on the AlN layer125and heating it in an atmosphere of N2gas is repeated at least twice or more. At this time, the amount of the N2gas dissolved in the molten aluminum layer is decreased as the heating step is repeated.
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Aoki Yuuichi
Hagiwara Yasumasa
Takeuchi Yukihisa
Torigoe Eiichi
Denso Corporation
Gregorio Guinever S
Harness & Dickey & Pierce P.L.C.
Mayes Melvin C
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