Patent ID: 9502865
Filing Date: 2016-11-22
CPC Classification: F02P,H01B,H01T

Claim Text:
1. A method of forming an igniter, comprising the steps of: providing an outer insulator formed of an outer ceramic material and having an insulator inner surface presenting an insulator bore, the outer insulator being green; disposing a conductive core formed of a core ceramic material and an electrically conductive component in the insulator bore; sintering the conductive core and the green outer insulator together after disposing the conductive core in the insulator bore; and the sintering step including hermetically sealing the insulator inner surface to the conductive core, wherein the outer insulator and the conductive core each have dimensions prior to the sintering step; and the sintering step includes shrinking the dimensions of the outer insulator by an amount of 9.6% to 29.6% and shrinking the dimensions of the conductive core by an amount less than the amount of the outer insulator.