Patent ID: 9377681
Filing Date: 2016-06-28
CPC Classification: B23K,G03F

Claim Text:
1. A mask manufacturing apparatus comprising: a stage comprising a support surface; a laser beam irradiator configured to irradiate a plurality of laser beams toward the support surface; a frame disposed over the support surface of the stage and comprising a plurality of raised bars forming a closed loop, each of the raised bars comprising a frame surface facing away from the support surface; and a heat spreader sheet placed over the support surface of the stage and comprising a heat spreader surface facing away from the support surface, wherein the heat spreader surface contacts a surface of a shadow mask for absorbing heat generated during making the shadow mask with irradiation of the laser beams, wherein the frame surface is raised relative to each of the heat spreader surface and another surface of the shadow mask facing away from the heat spreader surface.