Verification of tracking servo signal simulation from scanning tunneling microscope surface profiles

Thomas E. Karis; Margaret E. Best; Anthony Logan; James R. Lyerla; Robert T. Lynch Jr.; R. P. McCormack

doi:10.1117/12.45924

1 July 1991 Verification of tracking servo signal simulation from scanning tunneling microscope surface profiles

Thomas E. Karis, Margaret E. Best, Anthony Logan, James R. Lyerla, Robert T. Lynch Jr., R. P. McCormack

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45924
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

Abstract

Well-defined track crossing signals are essential for the laser tracking servo systems to follow radial runout. We developed an approach to verify Fourier Optics calculation of the track crossing signals from 3D surface profiles measured by Scanning Tunneling Microscopy (STM) and also by measuring the actual tracking servo groove signals from the substrate on an optical disk tester. Nearly quantitative agreement between the tracking signals calculated from the measured STM profiles and those measured by the optical disk tester was demonstrated on grooved glass disk substrates with a 1.6 micrometers pitch and nominal groove depths of 20, 40, and 70 nm, and on photopolymer on glass substrates with track pitches of 1.6, 1.4, 1.2, 1.0, 0.8 and 0.6 micrometers and a groove depth of 67 nm. Injection molded polycarbonate substrates made with high and low mold temperature showed poor replication at the lower mold temperature. The servo signals reflected the degraded servo groove performance due to the poor servo groove replication at the lower mold temperature.

Citation Download Citation

Thomas E. Karis, Margaret E. Best, Anthony Logan, James R. Lyerla, Robert T. Lynch Jr., and R. P. McCormack "Verification of tracking servo signal simulation from scanning tunneling microscope surface profiles", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45924

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available