Patent ID: 11133407

Abstract:
A super-junction IGBT device comprises a plurality of N-type pillars and a plurality of P-type pillars which are alternately arrayed in a horizontal direction. Device cell structures are formed at tops of super-junction cells and each comprise a trench gate having a gate trench striding across an interface of the corresponding P-type pillar and the corresponding N-type pillar. A body region is formed at a top of the corresponding N-type pillar, and a source region is formed on a surface of the body region. The top of each N-type pillar is provided with one body region and two trench gates located on two sides of the body region, and each body region is isolated from the P-type pillars on the two sides of the body region through the corresponding trench gates. The invention further discloses a method for manufacturing a super-junction IGBT device. Self-isolation of the P-type pillars is realized, the on-state current capacity of the device is improved, and the on-state voltage drop of the device is reduced.