Patent ID: 7598143
Filing Date: 2009-10-06
Classification: H01L

Abstract:
1. A method for producing an integrated circuit including a trench transistor structure comprising: providing a semiconductor body having a first and a second side and having a cell region; carrying out a first diffusion method, including introducing dopant atoms of a first conduction type via the first side into a mesa region and into a component region lying outside the cell region, which form a body zone in the mesa region; and carrying out a second diffusion method, by introducing dopant atoms of a second conduction type into the mesa region and into the component region, which form a source zone in the mesa region, the diffusion methods being coordinated such that the dopant atoms of the second conduction type indiffuse further than the dopant atoms of the first conduction type in a vertical direction in the component region and indiffuse not as far as the dopant atoms of the first conduction type in the vertical direction in the mesa region.