Category : Optics (components, coatings, instruments and systems) > Optical instrumentation, systems and accessories

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Ohara's GD-FHT are finely polished glass disks used in the testing of magnetic recording heads for Hard Disk Drives. We supply two types of disks, Conventional and Lower Microwaviness (Wa), and they are available as lubed or unlubed. The Conventional disks are well suited for fly height testing above 0.2 u-inch, while the Lower Wa disks are targeting lower fly height values. GD-FHT disks have better electrical properties than conventional disks and will provide better ESD protection. These disks have excellent mechanical strength and can significantly improve your production yields.
Advantages
- Conventional GD-FHT disks for > 0.2 u-inch
- Lower Microwaviness (Wa) GD-FHT disks for < 0.2 u-inch
- Better ESD protection than BK7
- More scratch resistant than BK7
- Lubed and Unlubed disks available
- Extremely smooth super polished surfaces
- Enables ultra low fly height testing
- All form factors available
- Re-Polishing service available

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