Patent ID: 7459265

Claim:
A pattern forming method on a resist formed on a predetermined substrate, said resist including adjacent first and second regions to be patterned, said method comprising the steps of: (a) performing a first exposure process with a first exposure mask using dipole illumination substantially on said first region of said resist, said first exposure mask having a repetition pattern in which a line and space are repeated alternately; (b) performing a second exposure process with a second exposure mask substantially on said second region of said resist, said second exposure mask having a standard pattern that is a pattern excluding said repetition pattern, said standard pattern at least partially including a connection pattern continuous with said repetition pattern; and (c) performing a development process on said resist having being subjected to said steps (a) and (b); wherein said first and second exposure masks each include first and second mask parts corresponding to said first and second regions of said resist, respectively, said first exposure mask is provided with a pattern for forming said repetition pattern on said first mask part, and a light blocking region on the whole surface of said second mask part, and said second exposure mask is provided with a pattern for forming said standard pattern on said second mask part, and an extension part of said connection pattern of said standard pattern and a light blocking region on said first mask part, said extension part being provided in a first extension region extending inwardly from a boundary line between said first and second mask parts by a first predetermined amount, said light blocking region being provided on the whole surface of a region excluding said first extension region and a second extension region, said second extension region extending inwardly from an edge line corresponding to an edge position of said pattern for forming said repetition pattern by a second predetermined amount.