Patent ID: 6027968
Filing Date: 2000-02-22
Classification: H01L

Abstract:
A method of making a stack capacitor comprising the steps of:providing a substrate;depositing alternating layers of low concentration doped oxide film and high concentration doped oxide film on said substrate;mask patterning said layers forming a via;dry etching said layers;selectively wet etching said layers;depositing thin layers of a conformal, conducting film and a conformal, high dielectric constant film on a bottom and a multiplicity of sides of said via;filling said via with dope polysilicon;planarizing said via filled with polysilicon;wet etching said polysilicon;depositing thin layers of a conformal, conducting film and a conformal, high dielectric constant film over said polysilicon; anddepositing borophosphosilicate glass over said layers and polysilicon.