Patent ID: 6514819
Filing Date: 2003-02-04
Classification: H01L

Abstract:
A process for forming a desired spacing d between adjacent widths of a product material, comprising:a) depositing a form material on the surface of a product material; b) forming patterns of photolithographic masking materials spaced apart by a distance D; c) removing portions of the form material by etching to leave the patterns of form material with opposed sidewalls spaced apart by a distance D which is greater than spacing d by 2&Dgr; and removing the photolithographic masking materials; d) depositing a layer of second masking material over the form material and product material, the layer of second masking material having a thickness correlating to &Dgr;; e) removing portions of the second masking material by etching until the form material is exposed, leaving &Dgr; widths of opposed second masking material contacting each of the opposed sidewalls of the form material, the distance between the opposed widths of second masking material being in a range down to 700 Ã¥; f) removing portions of the form material and the product material not protected by the second masking material; and g) removing the remaining portions of the second masking material, leaving the product material formed into multiple capacitive plates, and wherein at least two of the capacitive plates are separated by spacing d; wherein the form material, masking material and product material are each individually selected from the group consisting of nitride, oxide, conductor and laminate combinations thereof, but the form material and the masking material are not the same member and the masking material and the product material are not the same member.