Patent ID: 8829685

Claim:
A circuit device comprising: a circuit element; a lead electrically connected to the circuit element and having an inner side surface, an outer side surface, an upper surface and a lower surface; and a sealing resin covering the circuit element and the lead so that at least part of the lower surface and at least part of the outer side surface of the lead are exposed from the sealing resin and that the entire inner side surface and the entire upper surface of the lead are covered by the sealing resin, wherein a width of the lead is largest at the outer side surface of the lead in a plane parallel to the upper surface of the lead, the width of the lead in the parallel plane gradually increases toward the outer side surface of the lead having the largest width so as to produce a funnel-like shape, the funnel-like shape of the lead is contained in the sealing resin, and the lower surface of the lead is inwardly recessed from a lower surface of the sealing resin by 1 to 2 μm.