Patent ID: 8029949
Filing Date: 2011-10-04
Classification: G03F

Abstract:
1. A photomask for forming contact holes arranged on a wafer in a zigzag form along a transverse direction, comprising: a light transmitting substrate; a main pattern disposed on the light transmitting substrate with a zigzag form as upper main patterns disposed in a relatively upper portion and lower main patterns disposed in a relatively lower portion are arranged alternately along a transverse direction; first lower auxiliary patterns, each extending in a vertical direction and disposed adjacently to a lower portion of each of the upper main patterns; first upper auxiliary patterns, each extending in a vertical direction and disposed adjacently to an upper portion of each of the lower main patterns; a second lower auxiliary pattern extending in the transverse direction connecting the first lower auxiliary patterns with each other; and a second upper auxiliary pattern extending in the transverse direction and connecting the first upper auxiliary patterns with each other.