BOARD FOR SEMICONDUCTOR DEVICE

• Main Authors: MIYAMA HIROSHI, OOIWA SEIGO, SAITO SHIGEMASA, MOROZUMI AKIRA, NISHIURA SHINJI, NOZAKI TOSHIO
• Format: Patent
• Language: English
• Published: 30.07.1996
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PURPOSE: To improve heat dissipation properties through thinning of a board itself by adding zirconia to principal component of alumina and then adding one kind or more of additive, selected from a group of yttria, calcia, magnesia and ceria, thereto thereby preparing sintered ceramic having enhanced fracture toughness. CONSTITUTION: A ceramic board 2a is laminated on a heat dissipation base through adhesive or the like while being sandwiched by copper plates 2b, 2c thus constituting a CBC board 2. The ceramic board 2a in the CBC board 2 is produced by adding zirconia to principal component of alumina and then further adding one kind or more of additive selected from a group of yttria, calcia, magnesia and ceria thereby preparing a sintered cerarnic. Since the bending strength of the CBC board 2 is enhanced and the flexure thereof is increased, it can be made thin without causing any crack and the thermal conductivity can be enhanced geometrically.