Method for preparing synthetic quartz glass substrate
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Feb 11, 2020
Grant Date -
Dec 15, 2016
app pub date -
Jun 7, 2016
filing date -
Jun 7, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A synthetic quartz glass substrate is prepared by furnishing a synthetic quartz glass block, coating two opposite surfaces of the block with a liquid having a transmittance of at least 99.0%/mm at the wavelength of birefringence measurement, measuring a birefringence distribution on the block by letting light enter one coated surface and exit the other coated surface, and sorting the block to an acceptable group or unacceptable group, based on the measured birefringence distribution.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully