| 摘要 |
A heating apparatus 1 for preventing increase of the temperature difference on the heating surfaces and occurrence of heat spots in a broad temperature range including a high temperature region includes a substrate 2 made of a ceramic material with a heating surface 2A, a plurality of resistance-heating elements 3 and 4 buried in said substance 2, pairs of terminals 5 and 6, each pair of the terminals 6 and 5 being attached to a respective one of the resistance-heating elements to supply alternating current there to, and AC power sources 11A and 11B each connected to respective one of said pairs of the terminals 6 and 5 for the respective resistance-heating elements to supply the alternating current thereto. Insulating transformers 10A and 10B each are interposed between the respective AC power source and the pair of the terminals.
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