Patent ID: 7907390

Claim:
A circuit device, comprising: a metal substrate which is sectioned into a plurality of regions by an insulating film; and a first circuit element and a second circuit element which are electrically connected with said metal substrate, wherein said first circuit element and said second circuit element are mounted, respectively, directly on different ones of the plurality of regions of said metal substrate on a same side of the metal substrate, and wherein the respective regions on which the first and second circuit elements are mounted are separated from one another by the insulating film, and wherein the first circuit element is placed such that the first circuit element's edges, in their entirety, are located within a single region defined by the insulating film when viewed in a direction perpendicular to the insulating film and the second circuit element is placed such that the second circuit element's edges, in their entirety, are located within a single region defined by the insulating film when viewed in a direction perpendicular to the insulating film, wherein a first voltage is applied to a connection part of said first circuit element connected with said metal substrate, and a second voltage differing from the first voltage is applied to a connection part of said second circuit element connected with said metal substrate.