Patent ID: 6776862
Filing Date: 2004-08-17
Classification: B32B,C04B,H01L,H05K,Y10T

Abstract:
A method for fabricating a multilayered ceramic board comprising:providing a green laminate comprising a plurality of green base layers, at least one green constraining layer disposed in contact with a principal surface of at least one of the green base layers, and at least one wiring conductor disposed on a green base layer, wherein the green base layer comprises a low-temperature sinterable ceramic material comprising a ceramic powder and a glass component which precipitates a crystalline substance selected from the group consisting of forsterite, akermanite and diopside during firing, and a binder; and the green constraining layer comprises an inorganic material powder which is not sintered at the sintering temperature of the low-temperature sinterable ceramic material; and firing the green laminate at the sintering temperature for the low-temperature sinterable ceramic material, wherein the firing comprises binder removal for removing the binder contained in the green base layers and sintering for obtaining the sintered state of the low-temperature sinterable ceramic material in which the ceramic powder is densified while the glass component is fluidized in the green base layer, and wherein the rate of temperature increase from the binder removal to the sintering is more than about 20Â° C./minute so as to precipitate the forsterite, akermanite or diopside.