Flying height tester and flying height test method

Details Flying height tester and flying height test method Flying height tester and flying height test method

2007-04-17

2007-04-17

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

Reexamination Certificate

active

10993669

ABSTRACT:
A flying height tester includes a glass disc facing a magnetic head slider under test; an optical system for guiding light to the glass disc so that multiple reflections of light occur between the glass disc and the magnetic head slider; a light sensor receiving reflection light from the glass disc to output light intensity data; and a processor which calculates back the flying height based on an output function of the light sensor. The processor calibrates intensity gain data and intensity offset data of the output function using the data obtained in a pseudo-zero state of the flying height. This pseudo-zero state is obtained by applying an index matching liquid between a first-calibration magnetic head slider, having the same optical constants as the magnetic head slider under test, and the glass disc, the index matching liquid having a refractive index identical to the glass disc.

REFERENCES:
patent: 5280340 (1994-01-01), Lacey
patent: 6181458 (2001-01-01), Brazas et al.
patent: 6665077 (2003-12-01), Stirniman et al.
patent: 6-147841 (1994-05-01), None
patent: 7-503315 (1995-06-01), None
patent: 7-65331 (1995-10-01), None
patent: 8-507384 (1996-06-01), None
patent: WO 95/17646 (1995-06-01), None

Affiliated with

Also associated with

Rating

Flying height tester and flying height test method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flying height tester and flying height test method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flying height tester and flying height test method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3728691