| 摘要 |
PROBLEM TO BE SOLVED: To dissipate heat generated from a pellet well and to prevent intrusion of moisture into the pellet from the outside by exposing at least the lower surface at a part of two sides of an island bend downward to the outside from a part of two sides of a resin package. SOLUTION: A recess 34 is made in the upper surface at a part of two sides of a substantially rectangular resin package 32 from where a signal terminal is not projecting and the upper surface of the part of two sides of a substantially rectangular island 35, i.e., the opposite end parts 36, is exposed to the position of the recess 34. Since the island 35 has the opposite end parts 36 being bent downward with respect to the central part 37, the lower surface at the opposite end parts 36 is exposed to the lower surface of the resin package 32 but the central part 37 is not exposed thereto but located on the inside. The island 35 is formed into an arc having low opposite end parts 36 and high central part 37 for mounting a pellet 3. According to the structure, heat generated from the pellet 3 can be dissipated well. |
