Patent ID: 7141503

Claim:
A method for forming a pre-metallization layer on an underlying micro-structure, the method comprising the following: an act of depositing a first layer of undoped silicate glass on a micro-structure; an act of depositing a layer of phospho silicate glass on the first layer of undoped silicate glass; an act of densifying the layer of phospho silicate glass by applying a temperature to the combination of the layer of undoped silicate glass and the layer of phospho silicate glass that is sufficient to densify the layer of phospho-silicate glass, while being below a glass flow temperature of either of the undoped silicate glass or the phospho-silicate glass; an act of depositing a second layer of undoped silicate glass on the densified layer of phospho silicate glass without first planarizing the densified layer of phospho silicate glass; and performing chemical mechanical polishing on the second layer of undoped silicate glass.