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 13:
14. A ceramic member comprising:
an unfired first 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 first green sheet, and a second surface on an opposite side of the first surface; and
an unfired second green sheet made of a ceramic powder, provided on the first green sheet, covering the bulk metal film, and including a hole exposing the second surface of the bulk metal film,
wherein the bulk metal film has a melting point T1, and each of the first green sheet and the second green sheet 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 a combination of the first green sheet, the second green sheet, and the bulk metal film exhibits:
a decrease in a volume of each of the first green sheet and the second green sheet 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 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.