Hybrid integrated circuit

Abstract

Abstract PURPOSE:To make large current detection feasible for preventing a power semiconductor element from breaking down as well as a substrate from deforming while fine adjusting the resistance of copper foil by a method wherein a part of conductive channel formed on a metallic substrate is used as a current detection resistor. CONSTITUTION:A conductive channel 2 is formed on a metallic substrate 1 to dissipate heat even if a part of channel 2 is heated by supplying large current of around 40A to use the part as a detection resistor R04. In other words, a part of conductive channel 2 wherein large current can flow is used as the detection resistor R04 while a trimming means 16 is provided near the detection resistor R04. The interval between points a and b of the conductive channel 2 near a power semiconductor element 3 is used as the detection resistor R04 while a bridge circuit for current detection is made near the detection resistor R04. Furthermore, the trimming means 16 to adjust the resistance of detection resistor R04 is provided near the detection resistor R04.

Inventors

• 👤 Hisashi Shimizu
• 👤 清水　永
• 👤 Katsumi Okawa
• 👤 克実 大川

Bibliographic Details