参考文献
Hale, Jeffrey J.; Lynch, Christopher L.; Caldwell, Charles G.; Willoughby, Christopher A.; Kim, Dooseop; Shen, Dong-Ming; Mills, Sander G.; Chapman, Kevin T.; Chen, Liya; Gentry, Amy; MacCoss, Malcolm; Konteatis, Zenon D.
Patent: US2002/94989 A1, 2002 ;
US 20020094989 A1