Patent ID: 7528469

Claim:
Semiconductor equipment comprising: a first lead frame having a first semiconductor device, which has a high operational temperature; a second lead flame having a second semiconductor device, which has a low operational temperature lower than the operational temperature of the first semiconductor device; a thermal resistor for preventing heat transfer from the first lead frame to the second lead frame;and a temperature sensitive device for detecting the operational temperature of the first semiconductor device and for outputting a temperature signal to the second semiconductor device, the first lead frame being separated from the second lead frame by a predetermined distance, the thermal resistor being disposed in a clearance between the first lead frame and the second lead frame, the second semiconductor device restricting operaton of the first semiconductor device in a case where the operational temperature of the first semiconductor device is higher than a predetermined temperature; the first lead frame and the second lead frame being aligned in a horizontal direction, the thermal resistor being disposed between an outer periphery of the first lead frame and an outer periphery of the second lead frame; the first lead frame with the first semiconductor device and the second lead frame with the second semiconductor device being molded with a resin mold, which has thermal conductivity lower than that of the first or the second lead frame, and the thermal resistor being provided by a part of the resin mold, which is filled in the clearance between the first and the second lead frames; and wherein the semiconductor equipment is an igniter of an ignition coil, the first semiconductor device is a power device for switching primary current of the ignition coil on and off, and the second semiconductor device is a control device for controlling the power device.