Patent ID: 6271108
Filing Date: 2001-08-07
Classification: H01L

Abstract:
A method of forming a contact in a semiconductor device, comprising:forming a field oxide layer in a trench in a semiconductor substrate to define an active area;forming a barrier layer over the semiconductor substrate including the field oxide layer in the trench;forming a barrier layer etch mask covering an area of the barrier layer corresponding to the field oxide layer; andetching the barrier layer using the barrier layer etch mask to leave portions of the barrier layer covering only the field oxide layer;forming a transistor in the active area, the transistor including an impurity diffusion region in a portion of the substrate adjacent to the transistor;covering the substrate, including the transistor, with an insulating interlayer; andforming a contact hole in the insulating interlayer including simultaneously exposing a portion of the impurity diffusion region and a portion of the barrier layer.