Patent ID: 7183188

Claim:
A method for fabricating contact-making connections, comprising: a) providing a substrate with electronic circuit units arranged thereon, the substrate having an intermediate layer filling an interspace between the electronic circuit units, an insulation layer being deposited on the electronic circuit units and on the intermediate layer, a masking layer being deposited on the insulation layer, and the masking layer being patterned with a through-plating structure; b) patterning a contact-making region by means of the masking layer, a contact-making hole being etched through the insulation layer and the intermediate layer as far as the substrate, a section of the substrate being uncovered in accordance with the through-plating structure, and during the patterning provision is made of an overetching into the insulation layer lying below the masking layer; c) depositing a covering layer on the uncovered section of the substrate and on the masking layer; d) filling the contact-making hole with a through-plating material; e) polishing back the covering layer deposited on the masking layer as far as the masking layer; f) depositing a contact-making layer on the masking layer and the through-plating material, the contact-making layer being electrically contact-connected with the through-plating material; and g) patterning the contact-making layer together with the residual masking layer in accordance with a structure of a contact-making layer mask applied to the contact-making layer to form interconnects as contact-making connections in a metallization plane.