| 摘要 |
PROBLEM TO BE SOLVED: To joint a base material having a comparatively small thermal expansion coefficient, while occurrence of breakage and cracks is prevented, and moreover a degree of warping is suppressed. SOLUTION: The jointing method of a base material includes processes of: arranging a jointing material between a pair of base materials 12, 14 (13, 14) having different heat capacities respectively and a difference of a thermal expansion coefficient is within 10x10<SP>-7</SP>/°C; and melting the jointing material 3 by irradiating electromagnetic waves to the jointing material 3 arranged between the pair of the base materials 12, 14 and thereafter solidifying the same to joint the pair of the base material 12, 14 by the jointing material 3. The thermal expansion coefficient of a part of the jointing material 3 facing the base material 14 having a smaller heat capacity out of the pair of the base material is made smaller than the thermal expansion coefficient of the part facing the base material 12 (13) having a larger heat capacity by a difference within 10x10<SP>-7</SP>. COPYRIGHT: (C)2011,JPO&INPIT
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