Abstract: 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.

Abstract: 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.

Abstract: A ceramic member containing an insulating member is disclosed. The ceramic member comprises a ceramic body and an insulating layer on the ceramic body. The ceramic body contains aluminum oxide crystals and aluminum titanate crystals. The insulating layer contains silicon oxide as a main component. The ceramic body includes a first region that includes a first surface portion covered by the insulating layer, and a second region outside the first region, and having a surface resistivity of 1×106 to 1×109?/?. A surface resistivity of the first region is higher than the surface resistivity of the second region.

Abstract: This invention relates to a method for manufacturing aromatic compounds having the following formula (II) comprising the step of reacting an unsaturated aromatic compound having the following formula (I) with an aryl compound containing an iodosyl group or the salt thereof within a temperature range of from -50.degree. to 200.degree. C.