| 摘要 |
PURPOSE:To prevent the breaking of an LSI chip on a short circuit by directly connecting an electric-supply terminal for an LSI-chip loading substrate and an LSI-chip loading metallic plate electrically. CONSTITUTION:Pin terminals 25 for feeding power supply are connected electrically to an LSI-chip loading metallic plate 21' by wirings 29 in a substrate, and the wirings 29 in the substrate can be realized easily by a formation through a through-hole printing technique. The electric resistance of the wirings 29 can further be reduced by shaping a plurality of the wirings 29. Accordingly, when a heat sink is brought into contact with a grounding section for a frame, etc. for an apparatus, short-circuit currents pass and flow through the wirings 29 in an LSI-chip loading substrate having a small resistance value, thus resulting in little currents passing through the inside of an LSI chip. |
