Patent ID: 6638814
Filing Date: 2003-10-28
Classification: H01L

Abstract:
A method for the simultaneous production of storage capacitors and at least one well insulation in a semiconductor substrate, said method comprising the steps of providing a semiconductor substrate having at least one first region for the acceptance of storage capacitors and at least one second region for the acceptance of insulation; etching to simultaneously form a plurality of trenches in the first region and at least one trench in the second region, each trench in the first and second regions having a depth of more than 2 &mgr;m; creating a first electrode on walls of the trenches in at least the first region utilizing a doping technique; forming a dielectric in the trenches at least in the first region using a film technique; creating a second electrode in the trenches at least in the first region using a film technique, so that storage capacitors are formed in the first region; and creating at least one well region in the second region utilizing a well implantation, said well region being laterally limited by the at least one trench of the second region.