参考文献

Kuo, Sheng-Chu; Lee, Fang-Yu; Teng, Che-Ming; Huang, Li-Jiau; Chou, Li-Chen; Guh, Jih-Hwa; Pan, Shiow-Lin Patent: US2005/215612 A1, 2005 ; Location in patent: Page/Page column 3; 5 ;