A new dual-stage actuator for positioning a magnetic head for high-density hard disk drives was proposed and developed. This dual-stage actuator device is characterized by the sputter-deposited thin-film PZT, featuring large displacement of 1.2 /spl mu/m and high-resonance frequency over 15 kHz. In this paper, reliability against temperature, humidity, and mechanical shock was investigated to ensure the practical application to the drive products.
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Kuwajima et al. (2002) studied this question.
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