Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1991-01-28
1992-11-24
Robinson, Ellis P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428336, 428469, 428472, 428688, 428697, 428698, 428699, 428701, 428704, B32B 1504
Patent
active
051659832
ABSTRACT:
When molded plates of aluminum nitride obtained by molding a ceramic powder formed preponderantly of aluminum nitride powder are superposed on a support base with a ceramic powder interposed between the support base and the superposed plates and between the superposed plates and are fired in a non-oxidative atmosphere, the sintered plates consequently produced are prevented from sustaining crack or fracture.
When warped and undulated sintered plates of aluminum nitride are superposed on a support base with a ceramic powder interposed between the support base and the superposed plates and between the superposed plates and are heated in a non-oxidative atmosphere, the heated plates are relieved of warp and undulation.
The sintered plates of aluminum nitride are enabled to acquire improved adhesiveness to a metal film or foil when they are subjected to a heat treatment adapted to reduce the surface roughness to or below 10 .mu.m (Rmax).
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Mizunoya Nobuyuki
Sugiura Yasuyuki
Kabushiki Kaisha Toshiba
Robinson Ellis P.
Turner Archene
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