Patent ID: 7718079
Filing Date: 2010-05-18
Classification: H01L

Abstract:
1. A method for forming conducting structures separated by dielectric material over a substrate, comprising: providing a substrate and a wiring layer above the substrate; forming a conductive protective layer comprising titanium nitride on the wiring layer; forming a cap layer above the conductive protective layer; forming a first mask above the cap layer so that the first mask exposes selected portions of the cap layer, the first mask comprising a patterned photoresist layer; etching at least the cap layer using the first mask and etching the wiring layer using the first mask to form wiring lines separated by first gaps, remaining portions of the cap layer disposed above the wiring lines, at least portions of sides of the wiring lines exposed by the etching the wiring layer; and depositing a dielectric material within the first gaps and on the remaining portions of the cap layer disposed above the wiring lines at least when the depositing begins, an initial stage of the depositing forming initial layers of the dielectric material over the substrate, covering the exposed side portions of the wiring lines and on at least portions of the remaining portions of the cap layer, second gaps being defined by the initial layers between adjacent side portions of pairs of the wiring lines, the depositing continuing by performing high density plasma chemical vapor deposition at a sputtering rate sufficient to fill the second gaps between the wiring lines.