Electromagnetic field control member
An electromagnetic field control member includes an insulating member constituted of a cylindrical ceramic and having a plurality of through holes along an axial direction, a conductive member constituted of metal and closing the through holes so as to provide an opening that opens in an outer periphery of the insulating member, and a power supply terminal connected to the conductive member. The power supply terminal is located away from an inner wall of the insulating member forming the through holes, and has a first end and a second end in the axial direction, and at least one of the first end and the second end is located farther away from the inner wall than a central portion of the power supply terminal.
1. An electromagnetic field control member comprising:
a cylindrical ceramic insulating member having a plurality of through-holes along an axial direction;
a metal conductive member closing each of the plurality of through-holes so as to provide an opening that opens in an outer periphery of the insulating member; and
a power supply terminal connected to the conductive member,
located away from an inner wall of the insulating member forming the plurality of through-holes, and having a first end and a second end in the axial direction,
wherein at least one of the first end and the second end is located farther away from the inner wall than a central portion of the power supply terminal.
2. The electromagnetic field control member according to claim 1 , wherein the power supply terminal comprises an end member including the first end or the second end, and a central member including the central portion.
3. The electromagnetic field control member according to claim 2 , wherein the end member and the central member are fitted to each other.
4. The electromagnetic field control member according to claim 3 , wherein at least a part of the power supply terminal protrudes in a radial direction from an outer periphery of the insulating member.
5. The electromagnetic field control member according to claim 3 , wherein a metalized layer is provided on the inner wall.
6. The electromagnetic field control member according to claim 3 , wherein a width between inner walls gradually increases from the inner periphery to the outer periphery of the insulating member.
7. The electromagnetic field control member according to claim 6 , wherein in a cross section perpendicular to the axial direction, an angle formed by the inner walls opposing each other is 12° to 20°.
8. The electromagnetic field control member according to claim 2 , wherein at least a part of the power supply terminal protrudes in a radial direction from an outer periphery of the insulating member.
9. The electromagnetic field control member according to claim 2 , wherein a metalized layer is provided on the inner wall.
10. The electromagnetic field control member according to claim 2 , wherein a width between inner walls gradually increases from the inner periphery to the outer periphery of the insulating member.
11. The electromagnetic field control member according to claim 10 , wherein in a cross section perpendicular to the axial direction, an angle formed by the inner walls opposing each other is 12° to 20°.
12. The electromagnetic field control member according to claim 1 , wherein at least a part of the power supply terminal protrudes in a radial direction from an outer periphery of the insulating member.
13. The electromagnetic field control member according to claim 12 , wherein a metalized layer is provided on the inner wall.
14. The electromagnetic field control member according to claim 12 , wherein a width between inner walls gradually increases from the inner periphery to the outer periphery of the insulating member.
15. The electromagnetic field control member according to claim 14 , wherein in a cross section perpendicular to the axial direction, an angle formed by the inner walls opposing each other is 12° to 20°.
16. The electromagnetic field control member according to claim 1 , wherein a metalized layer is provided on the inner wall.
17. The electromagnetic field control member according to claim 16 , wherein a width between inner walls gradually increases from the inner periphery to the outer periphery of the insulating member.
18. The electromagnetic field control member according to claim 17 , wherein in a cross section perpendicular to the axial direction, an angle formed by the inner walls opposing each other is 12° to 20°.
19. The electromagnetic field control member according to claim 1 , wherein a width between inner walls gradually increases from the inner periphery to the outer periphery of the insulating member.
20. The electromagnetic field control member according to claim 19 , wherein in a cross section perpendicular to the axial direction, an angle formed by the inner walls opposing each other is 12° to 20°.