国产精品久久久久7777按摩,天天做天天爱天天综合网2021,曰欧一片内射VΑ在线影院,亚洲最大国产成人综合网站

Detection&Calibration >> Reference Material >> Minority carrier lifetime Reference Wafer
                


 


    Lifetime Reference Wafer is used to correct the parameters which is used to test the value of Lifetime,and than make it can accurate measure the value of lifetime.


 


    Because the lifetime of surface can decay with time growth,so every Lifetime Reference Wafer has its validity,we must re-Verificate them on time, the Cycle is commonly 5 months.


 






 
?2008-2050 HenergySolar. All rights reserved