| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device which solves the problem of not effectively preventing radiation of an electromagnetic wave to the outside and intrusion of the electromagnetic wave from the outside. SOLUTION: In the semiconductor device wherein the mounting part 1a of a semiconductor element 2 is formed on the upper face so as to surround an insulation base substance 1 having a grounding conductor 5 on the side, semiconductor element 2 mounted on the mounting part 1a and the mounting part 1a on the upper face of the insulation base substance 1, joined through a conductive sealant 7 sandwiching a frame-like conductive layer 4 continued electrically to the grounding conductor 6 and the frame-like conductor layer 4 on the upper face of the insulation base substance 1 and comprising an insulation covering body 3 forming a conductor layer 5 on the lower face, the joining part of the insulation base substance 1 and the insulation covering body 3 provides the exposure surface 12 of the insulation base substance 1 on the periphery of the frame-like conductor layer 4, the exposure surface 13 of the insulation covering body 3 is provided on the periphery of the conductor layer 5, the exposure surfaces 12, 13 are opposed, and a ratio in which the area of the opposed area is occupied on the area of the joining part is 0.3-0.9. |
