参考文献

Chen, Li; Firooznia, Fariborz; Gillespie, Paul; He, Yun; Lin, Tai-An; Mertz, Eric; So, Sung-Sau; Yun, Hong Ying; Zhang, Zhenshan Patent: US2010/125058 A1, 2010 ; Location in patent: Page/Page column 31 ; US 20100125058 A1