Patent ID: 8758536
Filing Date: 2014-06-24
Classification: B32B,C04B,H05K,Y10T

Abstract:
1. A method for manufacturing ceramic plates in which the ceramic plates are obtained by separating ceramic layers from a sintered body composed of the ceramic layers and metal layers alternately laminated to each other, the method comprising: a ceramic green-sheet forming step of forming ceramic green sheets from ceramic raw materials; a metal paste forming step of forming a metal paste using a metal component as a solid component which does not diffuse into ceramic during firing; a metal film forming step of applying the metal paste on surfaces of the ceramic green sheets to form metal films each having a thickness such that ceramic layers to be formed after firing are not connected to each other in the lamination direction; a laminate forming step of laminating the ceramic green sheets provided with the metal films to form a laminate; a firing step of performing a firing treatment for the laminate at a firing temperature which is set to a high temperature at which no glass component remains on surfaces of the ceramic layers after the firing and to a temperature equal to or lower than a decomposition temperature of a ceramic material forming the ceramic layers so as to form the sintered body composed of the ceramic layers and the metal layers alternately laminated to each other; and a separation step of immersing the sintered body in an oxygen removal processing liquid which removes oxygen present between the ceramic layers and the metal layers to separate the ceramic layers and the metal layers from one another without applying any external forces thereto.