Patent ID: 9588444
Date: 2017-03-07
CPC Classifications: F16F,G03F

Claim:
1. A lithography machine, comprising: a base frame; a primary base plate bearing an objective lens and an interferometer system, the primary base plate mounted on the base frame via a primary vibration dampening unit; a workpiece stage system configured to support a carrier of exposure photoresist; a mask stage system configured to support a carrier of exposure pattern; an illumination system configured to project a pattern on the carrier of exposure pattern onto the carrier of exposure photoresist via the objective lens; and a balance mass system comprising a balance mass and an anti-drift and compensation apparatus, wherein the balance mass comprises: a first part disposed on the base frame, the first part configured to support a workpiece stage system; a second part configured to support the mask stage system; and a third part configured to interconnect the first and second parts, wherein the anti-drift and compensation apparatus is disposed in proximity to a center of gravity of the balance mass and is configured to connect the third part of the balance mass to the base frame, and wherein the primary base plate is not in direct contact with any one of the first part, the second art and the third part of the balance mass.