国产做a爱片久久毛片a片,国产精品一久久香蕉国产线看观看,国产极品美女视频福利,亚洲卡一卡二卡三新区隐藏入口

                

 
    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.