Patent ID: 7423344
Filing Date: 2008-09-09
Classification: H01L

Abstract:
1. A film stack, comprising: a first layer of dielectric material comprising an organo-silicate glass; a layer of silicon carbide in contact with the first layer of dielectric material; a layer of silicon nitride in contact with the silicon carbide layer, wherein the silicon carbide layer is relatively thin with respect to the silicon nitride layer, and the silicon carbide layer is pre-treated on at least a silicon nitride facing surface thereof with a substance selected from a group consisting of helium and ammonia, and wherein a combined thickness of the layer of silicon carbide and layer of silicon nitride is of a thickness suitable for an etching process; and a second layer of dielectric material comprising a plasma-enhanced fluoro-silicate glass adjacent the silicon nitride layer, wherein an adhesion strength between the organo-silicate glass and silicon carbide reduces delamination effects in the film stack and the layer of silicon nitride in contact with the layer of silicon carbide reduces via-stress migration in the film stack.