A study of electrical charge at head-disk interface

被引：0
|
作者：
Z. Feng
E. Cha
X. Zhang
机构：
[1] SAE Magnetics (H.K.),
[2] Ltd.,undefined
来源：
Tribology Letters | 2005年 / 18卷
关键词：
electrical charge; contact potential; fluorinated coating; head-disk interface;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The electrical charge at head-disk interface (HDI) of disk drives becomes increasingly important as head-disk spacing drops below 10 nm range. In this study, a new method of measuring electrical charge at HDI is presented. It involves measuring magnetic read-back signals (i.e. PW50), while the flying height (FH) is lowered by electrostatic force. Typical HDI charges are in the range of −0.2 to −0.9 V, depending on individual head–disk combination. Experiments were also conducted to eliminate the HDI charge by using an ionizer and surface treatment of magnetic heads. It was found that the HDI charge can be effectively eliminated by treating the magnetic head with a fluorinated carbon coating. The mechanisms of HDI charge generation and elimination are discussed.
引用
收藏
页码：53 / 57
页数：4
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