Patent ID: 7767592

Claim:
A method for forming a mask pattern for ion-implantation, comprising: forming gate line patterns over a semiconductor substrate; forming a coating film on sidewalls of the gate line patterns and the semiconductor substrate exposed between the gate line patterns, wherein the coating film comprises a hydrophilic compound selected from the group consisting of hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone, methacrylic acid, acrylamide, and oligomers thereof; forming a photoresist layer over the gate line patterns, wherein a space is formed between adjacent gate line patterns, below the photoresist layer and above the semiconductor substrate; and performing an exposure process and a developing process on the photoresist layer between adjacent gate line patterns to remove the photoresist layer above the space and to expose an ion-implanting region of the semiconductor substrate, wherein one sidewall of each gate line pattern is exposed by the exposure process such that a bridged photoresist pattern is formed over each pair of adjacent gate line patterns over the non-exposed sidewalls thereof.