Reduced source capacitance ring-shaped IGFET load transistor in mesa-type integrated circuit

摘要

A self-aligned polysilicon gate depletion-type n-channel IGFET serving as a load transistor in a mesa-type integrated circuit having a P+ field region surface. The gate is ring-shaped and surrounds the IGFET source region. The source region does not intersect a mesa edge. The gate overlaps mesa edges to reduce peripheral capacitance.