Patent ID: 6437387
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A memory cell for use in a dynamic random access memory comprising:a silicon chip comprising an active area of a first conductive type and spaced regions of a second conductive type on a top surface of the silicon chip; a dielectric coating over the top surface of the silicon chip, comprising an essentially cup-shaped contact hole, the cup-shaped contact hole including a bottom plug portion making a low resistance connection to one of the spaced regions; a conformal lower conductive layer overlying the cup-shaped walls of the contact hole; an intermediate dielectric layer overlying the conformal lower conductive layer and extending over the dielectric coating; and an upper conductive layer overlying the intermediate dielectric layer, the lower and upper conductive layers being electrically isolated by the intermediate dielectric layer and forming a storage capacitor for the memory cell.