Patent ID: 7678534

Claim:
A mask for forming landing plug contact holes to vertically expose bar type active regions of a semiconductor substrate to bit line contacts or storage node contacts, wherein the mask has plural pairs of landing plug contact patterns arranged, wherein the pattern has a crescent bowed shape having an outwardly shifted and protruded middle portion, and the respective pair of the patterns are positioned to be facing each other so that the respective outwardly shifted and protruded middle portions are directed to the respective outward directions to form an inner space having a cross (+) shape; wherein a central part of the inner space having a cross (+) shape formed by the patterns facing each other is a region that a bit line contact is to be formed, and both side parts of the inner space having a cross (+) shape formed by the patterns facing each other are regions that storage node contacts are to be formed; and wherein the region that a bit line contact is to be formed is opened wider than the regions that storage node contacts are to be formed.