Production manner null of grain boundary insulating formation die semiconductor porcelain

摘要

PURPOSE: To manufacture a grain boundary insulating layer ceramic capacitor which is enhanced in characteristics and lessened in manufacturing man-hours by a method wherein diffusion material is easily and uniformly attached to the surface of a semiconductor ceramic. ;CONSTITUTION: A prescribed amount of pine resin 3 of organic binder is introduced into a drum 1 loaded with semiconductor ceramic 2, the drum 1 is rotated to cover the surfaces of the semiconductor ceramic 2 with pine resin powder 3. Furthermore, a prescribed amount of dry powder of diffusion material 4 is introduced into the drum 1, and the drum 1 is rotated to sprinkle diffusion material powder 4 on pine resin powder 3 to bind them together, whereby a diffusion layer is formed on the surface of the semiconductor ceramic 2. The semiconductor porcelains 2 are thermally treated at a prescribed temperature for a certain time to diffuse diffusion material into the grain boundaries of the semiconductor ceramic 2 for the formation of a grain boundary insulating layer-type semiconductor ceramic.;COPYRIGHT: (C)1994,JPO