Surface Defect Measurements of Computer Hard Disks

Information

• NSF Award
• 8722208

Owner

• PHOTOGRAPHIC SCIENCES CORP.

• Award Id

  8722208

• Award Effective Date

  9/15/1988 - 36 years ago

• Award Expiration Date

  2/28/1991 - 33 years ago

• Award Amount

  $ 101,501.00

• Award Instrument

  Continuing grant

This research is concerned with the measurement of surface defects on either hard disk media or hard disk substrates. These defects can effect the performance of a computer disk as the head tracks over the surface. The research concentrates on the measurement of surface defects on computer hard disks using non-contact optical scanning interferometry. The primary objective of the Phase II research is to measure the defects under typical rotating conditions of the disk. The effects of the signal to noise ratio, signal bandwidth, laser spot size, and focusing errors will be studied for different disk rotation speeds. The anticipated result of the Phase II research will be the development of a device for the characterization of one entire side of a computer hard disk surface. There is the potential for a rapid non-contacting measurement technique of surface features of a finished hard disk or uncoated hard disk is the development of new measurement techniques and test equipment that will have the potential to improve the quality of computer hard disks.

• Program Officer

  Ritchie B. Coryell

• Min Amd Letter Date

  9/23/1988 - 36 years ago

• Max Amd Letter Date

  9/23/1988 - 36 years ago

• ARRA Amount

• Name

  Photographic Sciences Corporation

• City

  Rochester

• State

  NY

• Country

  United States

• Address

  200 Commerce Drive

• Postal Code

  146233506

• Phone Number

  7163349640

• First Name

  Dag

• Last Name

  Lindquist

• Start Date

  9/15/1988 12:00:00 AM

• First Name

  Thomas

• Last Name

  Bristow

• Start Date

  9/15/1988 12:00:00 AM

• Name

  Computer Science & Engineering

• Code

  31

• Name

  Engineering-Electrical

• Code

  55

• Name

  Engineering-Mechanical

• Code

  56