Patent ID: 11950351
Assignee: KYOCERA CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An electromagnetic field control member comprising:
an insulating member made of a ceramic having a tubular shape, the insulating member comprising a plurality of through holes extending in an axial direction;
a conductive member made of a metal, the conductive member sealing off each through hole of the plurality of through holes and leaving an opening portion in the through hole, the opening portion opening to an outer periphery of the insulating member; and
a power feed terminal connected to the conductive member, wherein
the each through hole of the plurality of through holes comprises inner wall surfaces, inner wall surfaces further comprising: inclined surfaces for which a width between inner walls of the inclined surfaces facing each other gradually increases from an inner periphery of the insulating member to the outer periphery of the insulating member; and vertical surfaces located on an inner peripheral side of the insulating member and for which a width between inner walls of the vertical surfaces facing each other is constant.