A common cause for catastrophic failure in a magnetic disk storage system
is due to the collection of debris on the slider/head assembly. Two
factors contributing to these failures are:
a) disk liquid lubricant provides a sticky medium for debris accumulation;
and
b) electrostatic charge on the slider assembly generated by friction
attracts and accumulates debris.
A method for reducing electrostatic charge build-up uses a conductive
coating on a surface area of the slider. By providing a conducting path to
the metallic disk on which the recording medium is applied, the
triboelectrically generated charge on the slider is allowed to bleed-off.
Providing an additional overcoat of a solid self-lubricant, and forming a
wedge-shaped slider load-bearing surface for deflection of surface debris,
results in the reduction of both failure causes.