Patent ID: 11952316
Assignee: SHINKO ELECTRIC INDUSTRIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  B | IPC B  C  H

Claim 0:
1. A composite green sheet comprising:
an unfired green sheet made of a ceramic powder; and
an unfired bulk metal film, formed of a metal selected from a group consisting of aluminum, aluminum alloys, copper, and copper alloys, and having a first surface in contact with the green sheet made of ceramic powder, and a second surface on an opposite side of the first surface and exposed to an outside,
wherein the bulk metal film has a melting point T1, and the green sheet made of ceramic powder exhibits a relative density of approximately 90% or higher after firing at a firing temperature T2 higher than or equal to the melting point T1, such that the composite green sheet exhibits:
a decrease in a volume of the green sheet made of ceramic powder when fired at the firing temperature T2 that depends on the metal forming the bulk metal film and falls within a range higher than or equal to 700° C. and lower than or equal to 1600° C.,
substantially no change in a volume of the bulk metal film when fired at the firing temperature T2, and
melting and solidifying of the bulk metal film when fired at the firing temperature T2.