Patent ID: 7014537
Filing Date: 2006-03-21
Classification: H01L

Abstract:
1. A method of processing a semiconductor substrate, comprising: forming a dielectric layer over a semiconductor substrate; forming contact openings into the dielectric layer and alignment registration markings into the dielectric layer using a common masking step and at least one common etching step; forming a conductive material over the dielectric layer to within the contact openings and to within the registration markings; polishing through the conductive material to the dielectric layer using a polishing solution comprising a liquid and a solid; after said polishing, cleaning a remaining outermost polished surface of the semiconductor substrate with a first cleaning solution and a brush effective to remove at least some of the polishing solution from the outermost polished surface; after the brush cleaning, at least partially drying the outermost polished surface; and after the drying, spray cleaning the outermost polished surface with a second cleaning solution.