| 摘要 |
PROBLEM TO BE SOLVED: To provide a package designed such that gap between a mounting base plate and the package is reduced and heat dissipation can be improved.SOLUTION: A package comprises a base plate, a frame part, an input-side cushion plate, an output-side cushion plate, an input lead, an output lead, and a brazing material. The base plate has a first face and a second face. The frame part is provided in the outer circumferential area of the first face, and has an input-side insulation material, an output-side insulation material, an input conductive part, an output conductive part, and a frame-like wall. The input-side cushion plate is provided in an inner area, and has a linear expansion coefficient smaller than that of the base plate. The output-side cushion plate is provided apart from the input-side cushion plate so as to be opposite the output-side insulation material, and has a linear expansion coefficient smaller than that of the base plate. The brazing material joins between the frame part and the first face, between the input lead and input conductive part, between output lead and output conductive part, between input-side cushion plate and first face, and between the output-side cushion plate and first face. The second face is a polished face, and has warpage smaller than that of the first face. |
