| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board which uses an insulation material as a base material and enables highly reliable vacuum sealing, and to provide a manufacturing method of the circuit board.SOLUTION: A circuit board 1 includes: a glass substrate 7; a tapered through hole which vertically penetrates through the glass substrate 7; and a through electrode 3 formed by a metal member poured so as to close the through hole. An upper surface of the metal member includes a recessed part 19 that is a depression area having a recessed shape. |
