Title :
On-Spot (n,k) Compensation by CCD for Precision Optical Flying Height Measurement
Author :
Leong, S.H. ; Yuan, Z.M. ; Ng, K.W. ; Liu, B.
Author_Institution :
Data Storage Inst., Singapore
Abstract :
We propose a method to compensate for the n, k variation on the surface of a slider. This method provides the ability to determine more accurate local n and k values, thereby increasing accuracy and repeatability in the calculation of flying height. Implementing the method in a home built optical flying height tester, fly-height repeatability was greatly improved over that of a noncompensated case
Keywords :
compensation; ellipsometry; hard discs; height measurement; optical constants; charge-coupled device; fly-height repeatability; on-spot compensation; optical flying height measurement; slider surface; Charge coupled devices; Disk recording; Magnetic recording; Optical interferometry; Optical recording; Optical refraction; Optical variables control; Position measurement; Reflectivity; Testing; Fly height measurement; optical constants; slider;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878647
