| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cooling fin and the manufacturing method, which suppresses cost increase and improves cooling efficiency. <P>SOLUTION: A cooling fin 31 includes fin parts 1 integrally extending from a base part 2. Each fin part 1 is partially formed at a slant so that a proximal end portion is straight and a distal end portion is wavy. Each fin part 1 is partially slanted to make each fin part 1 wavier as coming closer to the distal end portion from the proximal end portion. In a manufacturing process of the cooling fin 31, firstly, a straight cooling fin is produced by extrusion molding (an extruding step). Subsequently, the distal end portion of each fin is partially bent in a direction intersecting an extruding direction into a wavy shape (a bending step). <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
