Patent ID: 6617187
Filing Date: 2003-09-09
Classification: G02F,H01L

Abstract:
A method for fabricating a monolithically integrated liquid crystal array display and control circuitry on a silicon-on-sapphire structure, comprising the steps of:a) forming an epitaxial silicon layer on a sapphire substrate to create a silicon-on-sapphire structure; b) ion implanting said epitaxial silicon layer with a species selected from the group consisting of silicon ions, tin ions, germanium ions, and carbon ions to create an ion implanted epitaxial silicon layer; c) annealing said silicon-on sapphire structure; d) oxidizing said ion implanted epitaxial silicon layer to form a silicon dioxide layer from a portion of said epitaxial silicon layer so that a thinned ion implanted epitaxial silicon layer remains; e) removing said silicon dioxide layer to expose said thinned ion implanted epitaxial silicon layer; f) fabricating transistors wherein each of said transistors is formed by patterning said thinned ion implanted epitaxial silicon layer to create a patterned epitaxial silicon layer growing a gate oxide on said patterned epitaxial silicon layer; forming a polysilicon layer over said silicon-on sapphire structure; doping said polysilicon layer; patterning said polysilicon layer and said gate oxide to form a gate region and to expose selected regions of said epitaxial silicon layer; ion implanting said selected regions of said epitaxial silicon layer to create source and drain regions in said epitaxial silicon layer that are self-aligned with said gate region; g) fabricating electrical contacts that are electrically connected to said transistors; and h) fabricating liquid crystal capacitors on said silicon-on sapphire structure that are electrically connected to said transistors by said electrical contacts.