| 摘要 |
PROBLEM TO BE SOLVED: To prevent influence of a thermal expansion difference and to provide great heat generation by aligning a plurality of elements having electrodes formed on the upper and lower main planes, arranging a plurality of heater units having metallic radiating elements adhering to both electrode surfaces via an adhesive and serving as an input terminal and a heat radiating plate at the same time, and electrically connecting the input terminals of the heater units together. SOLUTION: Four elements 1 principally consisting of barium titanate are arranged in the longitudinal direction. After a silicone adhesive is applied to the main plane of the element 1, a metallic heat radiating element 2 is overlaid while an input terminal 3 is arranged on the opposite side to the element 1, and then, the adhesive is heated and cured, and consequently, a heater unit is formed. These heater units are arranged in the longitudinal direction, and the adjacent input terminals 3 are caulked together by a connection terminal 4, and an electrically and mechanically jointed composite heating element is provided. In this way, the adhesive sufficiently absorbs thermal stress due to a thermal expansion difference between the metallic heat radiating element 2 and the element 1, so that a highly reliable composite heating element having an optical heat generation quantity can be provided easily.
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