1. (1) Korea Network Information Center (KNIC), www.nic.or.kr.
2. (2) The Ministry of Commerce, Industry and Energy, www.mocie.or.kr.
3. (3) Information Storage Industry Consortium (INSIC), International Optical Data Storage Roadmap, 2003.8.
4. (4) Choi, I.-H., Lee, M.-H. and Kim, J.-Y., Progress on Small Form Factor Optical Disc Drive Technology, ISOM 2004, pp.228-229.
5. (5) Cheong, Y.-M., Lee, J.-W. and Kim, K., Pikcup for SFO Drive with 2.3 mm Height Actuator, ISOM 2004, pp.250-251.