Patent ID: 9215801
Filing Date: 2015-12-15
Classification: H01L,H05K

Abstract:
1. A via-holed ceramic substrate comprising: a sintered ceramic substrate; an electroconductive via formed in the sintered ceramic substrate, said electroconductive via having an electroconductive metal closely filled in a through-hole, said electroconductive metal containing a metal (A) having a melting point of 600° C. to 1100° C., a metal (B) having a melting point higher than the melting point of the metal (A), and an active metal; and an active layer formed in the interface between the electroconductive via and the sintered ceramic substrate, wherein the sintered ceramic substrate is a sintered aluminum nitride substrate; the metal (A) having the melting point of 600° C. to 1100° C. is one or more selected from a group consisting of gold solder, silver solder, and copper; and the metal (B) having the melting point higher than the melting point of the metal (A) is one or more selected from a group consisting of silver, copper, and gold.