Patent ID: 6753265
Filing Date: 2004-06-22
Classification: H01L

Abstract:
A method of manufacturing a bit line, the method comprising the steps of:successively forming a conducting layer and an insulating layer on a substrate, the conducting layer serving to form a bit line; forming a photoresist film on the insulating layer; etching the photoresist film using a photolithography process so as to form a first mask pattern on the insulating layer in such a manner that a desired region of the insulating layer is exposed; etching the first mask pattern by an isotropic dry etching so as to form a second mask pattern, wherein the isotropic dry etching is carried out with plasma dry etching equipment, which uses a microwave energy source; removing the insulating layer by a first anisotropic dry etching using the second mask pattern; removing the second mask pattern; and etching the conducting layer by a second anisotropic dry etching using the remaining insulating layer, so as to form the bit line.