Patent ID: 7052970

Claim:
A method for producing insulator structures in a semiconductor substrate, comprising: introducing insulator trenches into the semiconductor substrate front a substrate surface of the semiconductor substrate; and partially filling the insulator trenches with a main layer made of an additive-doped insulator material in the course of an HDP deposition process based on a high density plasma, wherein in the course of the HDP deposition process end in a common process chamber: first a predeposition process in which silmne and oxygen are supplied as chemical precursor compounds is controlled with exclusion of halogens or halogen compounds and an additional layer of the insulator structure is produced, then a barrier layer, which blocks an interaction of the additive with the semiconductor substrate, is produced before a deposition of the main layer, and after production of the main layer, an auxiliary deposition process is controlled with exclusion of halogens or halogen compounds and a termination layer of the insulator structure is provided.