Patent ID: 6358856
Filing Date: 2002-03-19
Classification: H01L

Abstract:
A method of forming a contact hole for a semiconductor device, comprising:forming an interlayer dielectric layer on a substrate, and then forming a positive resist on the interlayer dielectric layer; irradiating the positive resist to form an irradiated positive resist layer using a bright field mask, wherein the bright field mask has a pattern corresponding to a contact hole to be formed within the semiconductor device; developing the positive resist, so as to remove the irradiated positive resist layer, thereby leaving only a portion of the positive resist remaining above the interlayer dielectric layer; applying a negative resist to cover the interlayer dielectric layer and the portion of the positive resist; recessing the negative resist so that a top region of the portion of the positive resist extends above the recessed negative resist; exposing the recessed negative resist and the portion of the positive resist to a flood light exposure; and applying a developer to the semiconductor device so as to remove the portion of the positive resist, wherein a contact hole is formed in a location where the portion of the positive resist was previously formed.