Patent ID: 11940726
Assignee: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A lithography apparatus comprising:
a light source for emitting light;
a mask mounting zone where a mask for reflecting the light is disposed; and
a mask protective module disposed on the mask to transmit the light from the light source toward the mask, and
a penetration region replacing device,
wherein the penetration region replacing device comprises:
a rod; and
a penetration region mounting unit connected to an end of the rod and configured to turn on the rod as an axis, wherein the penetration region mounting unit comprises a plurality of penetration region modules providing a penetration region of a membrane and turns to provide a new penetration region module not used on the mask protective module,
wherein the mask protective module comprises,
a frame; and
the membrane supported by the frame,
wherein the membrane includes the penetration region for transmitting the light and a peripheral region of which a light transmittance is lower than that of the penetration region.