| 摘要 |
PURPOSE:To provide a power module, wherein the prevention of the erroneous operation in a drive control circuit and the maintenance of excellent heat radiating property can be made compatible, and which can readily obtain the compact configuration and the cost reduction. CONSTITUTION:A metal substrate 1 having a first insulating layer 2 on one surface, a second metal substrate 3 arranged on a part of the exposed surface of the insulating layer 2, an insulating layer 4 arranged on the exposed surface of the metal substrate 3 and a wire 20, which keeps the metal substrate 3 at the grounding potential, are provided. A power switching element group 6 is arranged on the exposed surface of the insulating layer 2. A pre-driver IC 8 is arranged on the exposed surface of the insulating later 4. The switching noise from the power switching element group 6 is shielded with the metal substrate 3 kept at the grounding potential. Therefore, the erroneous operation of the control circuit can be prevented. The power switching element group 6 is arranged on the heat radiating metal substrate 1 only through the insulating layer 2. Therefore, the heat radiating effect can be sufficiently enhanced. |
