Patent ID: 8011646
Filing Date: 2011-09-06
Classification: B25B,Y10S

Abstract:
1. A vacuum chuck for absorbing a substrate, comprising: an absorbing plate to absorb the substrate, the absorbing plate having a first region for absorbing the substrate and a second region formed in an outer portion of the first region; and a plurality of vacuum lines formed on the surface of the absorbing plate, each vacuum line being linearly formed in a line shape extended to one side from the other side of the first region of the surface of the absorbing plate corresponding to the substrate, the vacuum lines being contacted with the surface of the substrate to absorb the substrate, wherein the plurality of vacuum lines are obliquely extended to the sides of the absorbing plate and a distance between the vacuum lines is uniform in the whole area of the first region of the absorbing plate, wherein all of the vacuum lines are extended in the same direction on the surface of the absorbing plate.