| 摘要 |
PROBLEM TO BE SOLVED: To reduce constituent parts of radiator of electronic components and simplify structure for reducing the manufacturing cost. SOLUTION: A plurality of cooling fins 1 are prepared, in which two same shape are formed in a sinker post manner by punching of a piece of metal plate of right-angled quadrangle, and a plurality of cooling fin pieces 1b connected by a side edge part 1a are provided, and the side edge parts 1a of the cooling fins 1 are engaged with and are fixed to a plurality of parallel grooves 2a formed on a plane of a metallic substrate 3, for constituting a radiator of electronic components.
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