| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat sink that improves heat-dissipation efficiency while sufficiently securing a cross-sectional area of an extrusion part. <P>SOLUTION: The heat sink 1 includes a body 10 having: a base 11 formed with a heating-element mounting part 11c; and a plurality of heat-dissipating fins 12, 13 erected on the base 11. The heat sink is formed by die-casting. The tip edge of each heat-dissipating fin 13 is formed with each extrusion part 14. The extrusion parts are pressed by extrusion pins, provided in a die, when releasing the body 10 from a die-casting die. The extrusion part 14 is formed to have a rectangular cross-section and protrudingly provided on one of the side faces of the heat-dissipating fin 13. <P>COPYRIGHT: (C)2011,JPO&INPIT |
