| 摘要 |
PROBLEM TO BE SOLVED: To simplify the manufacturing process of a heat sink having the functions of a heat spreader and a stiffener by forming stiffener sections by bending and doubling the sections protruded from a heat sink section formed in a regular octagonal shape. SOLUTION: A heat sink section 2 is formed in a square plate-like state, and stiffener sections 3 are formed by downwardly doubling four sides of the section 2 180 deg. until the sections 3 are put on the lower surface of the peripheral section of heat sink section 2. Consequently, a semiconductor chip mounting section 4 which is formed at the center of the heat sink section 2 is surrounded by the stiffener sections 3. Then a double coated adhesive tape 5 is stuck to the stiffener section 3 for sticking the sections 3 to a substrate composed of a polyimide tape. Therefore, the manufacturing process of the metallic heat sink 2 can be simplified, because it becomes unnecessary to form the stiffener sections 3 by using different metallic sheets from that of the heat sink section 2, and no taping work is required for fixing the sections 3 to the section 2. |
