超碰在线观看过国产|久久久在线草AV|人人人人操人人人人|18禁成人污网站|亚洲图片视频小说|五月天综合网友自拍|福利精品在线观看|五月婷婷六月999|婷婷天堂avtt|兽x人八区成人网

                

 
    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.