| 摘要 |
PURPOSE:To perform high-precision mounting with high efficiency, by providing the bottom surface of a resin seal layer with the recess of a guide for positioning, and fitting it on a protrusion for positioning formed on a printed board side. CONSTITUTION:An external lead 2 is bent up to the same level as the bottom surface of a resin seal layer 1, and a recess 3 for a guide is formed on the bottom of the resin seal layer. Mounting is performed by fitting the recess 3 of resin on a protrusion for positioning on a printed board 6. By arranging asymmetrically the recess 3 with respect to a central point, opposite direction mounting can be prevented.
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