Preparation and esd protection device Esd protector

To provide a manufacturing method and ESD protection devices of the ESD protection device adjustment and stabilization of the ESD characteristics can be facilitated. Forming a portion to become the first and second portions and the mixing portion 20 comprising a connecting conductor 14, 16 to the sheet made of the insulating layer 101 and 102 by laminating a sheet heating. Areas of the mixing unit 20, and the gap forming material, (i) a metal and a semiconductor, (ii) metal and ceramic, (iii) a metal and a semiconductor and a ceramic, (iv) a semiconductor ceramic, (v) a semiconductor, ( metal coated by vi) an inorganic material, (vii) coated metal and a semiconductor of an inorganic material, (viii) coated metal and ceramic by inorganic material, (ix) a metal coated with an inorganic material and a semiconductor and a ceramic It is formed using a mixture-forming material and the solid components are mixed comprising at least one of. Void forming material disappears by the time of heating, mixing portion 20 of the air gap and the solids are dispersed is formed.