On 18th ,NOV 2004, Beijing leyfond vacuum tech. Co., ltd and Sentech Instruments company hold a meeting of the Train & tech communion of theEllipsometer & ICP application seminar in Beijing expert building ,there are thirty expert, scholar and the engineer attend it from Beijing ,xi;an jilin taiyuan of the company , academe,college! They talk about with Dr. Qian and fang liwu senior engineer of Ellipsometer & ICP application .