Abstract: The present disclosure relates to a cell culture composition including a Chlorella extract. According to the cell culture medium composition including the Chlorella extract according to an aspect, the medium including the Chlorella extract can improve the cell proliferation ability of bovine myogenic stem cells. Thus, the Chlorella extract can be used as a substitute for fetal bovine serum.

Abstract: Disclosed herein is a method of correcting defects in photomasks. According to one embodiment, a light absorption layer is formed on a photomask where pin hole defects occur in a light blocking layer, and light absorption patterns are formed on the pin hole defect portions by selectively etching the light absorption layer. According to another embodiment, a light absorption layer is formed on a backside of a photomask having pin hole defects in a light blocking layer, and light absorption patterns are formed on the backside of the photomask substrate corresponding to a region having pin hole defects by etching the light absorption layer.

Abstract: Disclosed herein is a method of correcting defects in photomasks. According to one embodiment, a light absorption layer is formed on a photomask where pin hole defects occur in a light blocking layer, and light absorption patterns are formed on the pin hole defect portions by selectively etching the light absorption layer. According to another embodiment, a light absorption layer is formed on a backside of a photomask having pin hole defects in a light blocking layer, and light absorption patterns are formed on the backside of the photomask substrate corresponding to a region having pin hole defects by etching the light absorption layer.