Ohara Corporation
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Precision Polished Substrates DOWNLOAD PDF

Ohara is a world class manufacturer of precision polished substrates, fused silica and optical glass substrates. Our facility uses double-sided lapping and polishing machines to produce high quality plano substrates with extremely low surface roughness and flatness values. Some of the uses for our polished substrates include photomask substrates, TFT plates, phase masks and LCD's.


- Type of materials - quartz, fused silica, optical glasses, etc.
- Polished substrates available from 25 to 360 mm diameter
- 5" and 6" Sq. Photomask Substrates & custom sizes
- RMS Values ~ 2 Angstroms (via AFM)
- Flatness Values ~ 1 micron (via Tropel Flatmaster)
- Substrates suitable for use at 248 nm
- Class 100 Clean Room and Megasonic Cleaning Unit
- Excellent Metrology Capabilities

Glass Wafer Carriers
Ohara substrates are ideal for use in the temporary wafer bonding process. Our glass wafer carriers allow for semiconductor wafer thinning of various materials such as silicon, gallium arsenide, and others. We also provide laser marking for easy traceability.

-Glass wafer carriers
-Temporary wafer bonding
-Laser marking
-Semiconductor wafer thinning



Glass Products