Patent ID: 6924217

Claim:
A method of forming a trench in a semiconductor device, comprising: (a) a step of depositing a first pad film and a second pad film on a semiconductor substrate; (b) a step of patterning the first pad film and the second pad film; (c) a step of forming spacers on inner side walls of the patterned first and second pad films; (d) a step of performing a first ion implanting process to the semiconductor substrate exposed between the spacers; (e) a step of performing an etching process to decrease thicknesses of the spacers, thereby increasing a line-width of a trench to be formed in subsequent processes; (f) a step of performing a second ion implanting process to the semiconductor substrate; and (g) a step of etching an area of the semiconductor substrate in which lattice defects are caused through the first and second ion implanting processes, thereby forming the trench.