Patent ID: 6437401
Filing Date: 2002-08-20
Classification: H01L

Abstract:
Semiconductor apparatus comprising:a semiconductor body defining a trench therein and being of a first conductivity type; first and second semiconductor regions of a second conductivity type that is opposite the first conductivity type, said regions being located within the semiconductor body and being separated by a portion of the semiconductor body; each of the first and second semiconductor regions having a section thereof which defines portions of a wall of the trench; a part of the portion of the semiconductor body between the first and second semiconductor regions defining a void which extends around the perimeter of the trench; the wall of the trench being lined with an insulating layer that separates the void from the trench and separates the second semiconductor region from the trench; and the trench being filled with a conductive material that contacts the section of the first semiconductor region that defines a portion of the wall of the trench.