ZHANG Guang-ming, LIU Jie, XU Shou-yu, ZHENG Yun-you, WU Cheng-long, QU Hong-ming, LI Wei, SONG Yong-zhen, LI Zheng-xun. Preventing Method of Al Corrosion for Applying Improved 4-Mask[J]. , 2013,28(2): 224-227
ZHANG Guang-ming, LIU Jie, XU Shou-yu, ZHENG Yun-you, WU Cheng-long, QU Hong-ming, LI Wei, SONG Yong-zhen, LI Zheng-xun. Preventing Method of Al Corrosion for Applying Improved 4-Mask[J]. , 2013,28(2): 224-227 DOI: 10.3788/YJYXS20132802.0224.
Improved 4-Mask process was developed in order to reduce manufacturing process.This process has several issues.If the delay time between Active Etch and 2SD Wet Etch was too long(5.9 h)
there will be Al corrosion in the channel by Cl
2
which is used by Active Etch. However
it brings a matter to a successfully settlement and meets with good results about Al corrosion prevention with adding SF
6
/O
2
in the After-Treatment of Active Etch. Moreover
it brings successfully results to be applied to improved 4-Mask process.