Muncy, Geissler, Olds & Lowe, P.C.
Objective lens protection device, objective lens system and lithographic device
An objective lens protection device, objective lens system and lithographic device. The objective lens protection device includes a main structure provided with, oppositely disposed, an air supply unit and extraction unit. The air supply unit is used to output air. The extraction unit extracts air output by the air supply unit to form at least one layer of air curtain between the air supply unit and extraction unit. The objective lens protection device can effectively control the flow rate of wind discharge, controlling wind in a laminar flow state and ensuring uniform flow field of the air curtain, and can effectively block organic matters volatilized from the bottom up, eliminate opportunity for a direct contact of the organic matters with the lens, and prevent objective lens from contamination by the volatilization of the organic matters of photoresist, thus ensuring the imaging quality of the objective lens.
Shanghai Micro Electronics Equipment (Group) Co., Ltd.
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Xianming Baotong
Li Hao