| 摘要 |
PURPOSE: To exhibit excellent performance by depositing screen printing layers on a lower face, wherein each of the layers is formed of a specific insulating material, conductive material and dielectric material. CONSTITUTION: An insulating layer 21, a conductive material 22 serving as a current supplying line and a dielectric resistant layer 23 are deposited on the lower face 12 of a glass-ceramic plate supporter 10. The insulating layer 21 is prepared by treating a predetermined quantity of a starting mixture in a glass or amorphous phase; the conductive material 22 is made of Ag or CuO; and the resistant layer 23 is prepared by treating a predetermined quantity of a starting mixture in a glass or active phase. Each of the layers 21, 22, 23 has an expansion coefficient approximate to that of a glass-ceramic material, and heating at about 650 deg.C can be achieved by thermal dissipation. A heating member R is heated by power supply lines C1 , C2 of the conductive material 22, and the insulating layer 21 can form an insulator even if temperature becomes high. Furthermore, the dielectric layer 23 can uniformly distribute heat over the entire heat source surface, thereby enhancing performance of an element. |
