Patent ID: 11868052
Assignee: ZHEJIANG CHEER TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. An immersion liquid supply and recovery device, comprising extraction openings, a plurality of extraction chambers and sealing extraction channels, wherein the immersion liquid supply and recovery device is provided between a projection objective lens system and a substrate, a circular through hole through which laser beams pass is formed in a center of the immersion liquid supply and recovery device, the plurality of extraction openings are distributed on a lower end face of the immersion liquid supply and recovery device facing the substrate and along the circumferential direction of the circular through hole, the extraction chambers are communicated with an immersion flow field through the plurality of extraction openings, and the extraction openings communicated with different extraction chambers are distributed alternately along the circumferential direction; and there are at least two extraction chambers each communicated with an immersion liquid extraction system through one sealing extraction channel.