公开(公告)号：US20180081069A1

公开(公告)日：2018-03-22

申请号：US15730615

申请日：2017-10-11

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Kohei OOTA ,  Tomohisa MOTOMURA ,  Motonori OONO

IPC: G01T1/185 ,  G01T7/00

CPC classification number: G01T1/185 ,  G01T1/18 ,  G01T7/00 ,  H01J47/06

Abstract: A radiation detector using gas amplification, includes: an insulator having a first surface and a second surface positioned at a back surface side of the first surface; a first electrode layer that is provided on the first surface of the insulator and has a circular opening portion; a pixel electrode positioned inside the opening portion; a second electrode layer provided on the second surface of the insulator; and a via hole conductor that has one end surface thereof bonded to the second electrode layer through the interior of the insulator and has the other end surface thereof bonded to the pixel electrode, in which at least a part of the other end surface side of the via hole conductor exhibits a column or truncated cone shape and an outer diameter of the via hole conductor becomes smallest at the one end surface.