Aluminum nitride sintered body with high thermal conductivity and its preparation

• Main Authors: GUITON; THERESA A, TANAKA; KYOJI, KAJITA; SUSUMU, YODEN; HIROYOSHI, ZHAO; JUNHONG, RAFANIELLO; WILLIAM, CHIAO; YI-HUNG, HASHIMOTO; NOBORU
• Format: Patent
• Language: English
• Published: 28.04.1998
• Edition: 6
• Subjects: ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SEMICONDUCTOR DEVICES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TREATMENT OF NATURAL STONE

PCT No. PCT/US94/04256 Sec. 371 Date Dec. 7, 1995 Sec. 102(e) Date Dec. 7, 1995 PCT Filed Apr. 18, 1994 PCT Pub. No. WO95/02563 PCT Pub. Date Jan. 26, 1995An aluminum nitride sintered product with a high thermal conductivity (at least 100 W/m.K) can be prepared at a sintering temperature of less than 1850 DEG C. (often less than 1650 DEG C.) using a sinterable combination of aluminum nitride powder with at least three sintering aids. The sintering aids include a source of a rare earth metal oxide, a source of an alkaline earth metal oxide, a boron source and, optionally, a source of aluminum oxide. The sinterable combinations may also be used to prepare cofired, multilayer substrates.