Patent ID: 8383488
Filing Date: 2013-02-26
Classification: H01L

Abstract:
1. A method for the production of a semiconductor component with a first and a second trench in a substrate comprising a semiconductor, in which the first trench is filled with a dielectric and in which the second trench is filled with a conductive material to form an electric contact to a buried structure, the method comprising the steps of: (a) first, producing the first and second trenches in the semiconductor substrate, the first trench being produced with a width w (b) subsequently, depositing a dielectric over an entire surface and with edge covering, in a thickness such that the first trench is completely filled with the dielectric, and such that the second trench remains partially opened; (c) subsequently, etching the dielectric anisotropically until substrate at a bottom of the second trench is freely exposed; and (d) subsequently, depositing an electrically conductive material over the entire surface and with edge covering until the second trench is filled;