Patent ID: 6761085
Filing Date: 2004-07-13
Classification: H01L,Y10S,Y10T

Abstract:
A system for reducing vibrations in a wafer handling arm comprising:a wafer handling arm for handling wafers, the wafer handling arm defining a plane; and a vibration damper connected to a response point on the wafer handling arm, the vibration damper comprising: a mass; and a spring connected between the response point on the wafer handling arm and the mass to form a mass spring system having a desired vibration frequency in an out of plane direction, the vibration frequency of the mass spring system corresponding to an out of plane bending mode vibration frequency of the wafer handling arm to be damped by the vibration damper to prevent contaminant-producing impacts between the wafer handling arm and the wafer; the mass and spring being constructed of contaminant-free materials suitable for a low-contaminant wafer processing environment and the vibration damper providing contaminant-free damping by the transfer of kinetic energy from the wafer handling arm to the mass spring system.