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자료유형
학술저널
저자정보
이호성 (경상대학교)
저널정보
Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering Vol.37 No.2
발행연도
2020.2
수록면
163 - 171 (9page)
DOI
10.7736/JKSPE.019.116

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초록· 키워드

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Since IBM introduced the first hard disk drive (HDD) with 5 MB capacity in 1956, tremendous advances have been achieved in HDD technology and business. The areal density has increased 650 million times in the last 60 years. To implement the digital servo systems for high capacity HDD, elaborate servo patterns should be written on the disk surface during manufacturing processes. This process is called servo track writing (STW). When the servo track pitch reaches 50 nano-meter, the position error resolution should be less than 5 nano-meter for the drive servo and STW operations. The STW technology is in the realm of nano-mechatronics and should address precision motion control and manufacturing issues. Initially, all STW process were conducted inside the clean-room using special STW equipment. With ever-increasing track density, as well as the STW time and manufacturing costs, the industry has developed the STW technology that could move the STW operation to the outside of the clean-room and eliminate special equipment. Many innovative STW technologies have been invented and successfully implemented such as conventional STW, multi-disk writers, printed magnetic printing STW, spiral STW and spiral-seeded STW. With the successful implementation of these state-of-the-art technologies, HDD production has become more efficient and flexible.

목차

1. Introduction
2. Brief History of Computer Hard Disk Drives
3. Development of HDD Servo Systems
4. Evolution of Servo Track Writing (STW)
5. Advanced Servo Track Writing Technology
6. Servo Track Writing based on Spiral Reference Pattern
7. Summary and Conclusion
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