国产三级做爰在线播放-亚洲精品永久免费-最新午夜福利视频理论片免费在线观看-一 级做人爱全视频在线看-免费精品91香蕉国产线-日韩一区二区三区在线视频

                

 
    Resistivity Reference wafer of single crystal silicon material is made by using High purity polysilicon,throught  the single crystal equipment,and then using many manufacturing process such as doping by the way neutron evolution.Having the standards  which has certain hysical geometry size. Using Standard device which  the uncertainty is known to Calibrate the resistivity value and other parameters of Resistivity  Reference wafer.
 
    The Specification Requests of   Resistivity  Reference wafer.


 


 
    The size and the surface quality of  Resistivity  Reference wafer.