Ceramic sintered body substrate, light-emitting device, and methods for manufacturing ceramic sintered body substrate and light-emitting device

Abstract

A method for manufacturing a ceramic sintered body substrate includes preparing a ceramic substrate 1 provided with a through hole 2 before firing (S11), disposing a first metal paste 3 in the through hole (S12), and firing the ceramic substrate provided with the first metal paste (S14). In the disposing of the first metal paste, the first metal paste includes a plurality of particles of first metal powder (4) and a plurality of particles of active metal powder (50), and the first metal powder includes a metal powder (4a) serving as a core, and a covering metal member (40b) having a melting point lower than a melting point of the metal powder and covering at least a part of the metal powder, and in the firing of the ceramic substrate, a firing temperature is a temperature in a range from 700° C. to less than the melting point of the metal powder.

Dependencies are inferred from the claim text.