Glass Disks for Flying Height Testers (GD-FHT) - Ohara - #1

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O H A R A C O R P O R AT I O N www.oharacorp.com ADVANTAGES Glass Disks for Flying Height Testers (GD-FHT) GD-FHT Ohara's GD-FHT is a finely polished glass disk used in the testing of magnetic recording heads designed for Hard Disk Drives. We supply three types of disks including Conventional, Low Waviness, and Super Low Waviness. These can be supplied with surface features such as anti-reflective coating and lube. Conventional disks are well suited for fly height testing above 0.02 microns while Low and Super WA disks are used in lower fly heights around 0.01 microns. Ohara's GD-FHT disks have better electrical properties and ESD protection when compared to competing materials. Combined with excellent mechanical strength, production yields can be significantly improved.. Conventional GD-FHT disks for fly heights > 10nm Lower Microwaviness (WA) GD-FHT disks for < 10nm Super Low Microwaviness GD-FHT disks for < 5nm More scratch resistant and better ESD than BK7 Anti Reflective and Lubed coatings available Extremely smooth super polished surfaces Enables ultra low fly height testing Sizes include 48mm, 65mm, and 99mm Re-polishing service available Photo courtesy of KLA-Tencor