Title:
GLASS SUBSTRATE END SURFACE EVALUATION METHOD, GLASS SUBSTRATE END SURFACE PROCESSING METHOD, AND GLASS SUBSTRATE
Document Type and Number:
WIPO Patent Application WO/2012/005019
Kind Code:
A1
Abstract:
Disclosed are: a glass substrate end surface evaluation method that enables the characteristics of an end surface of a glass substrate to be accurately evaluated; a glass substrate end surface processing method based on the evaluation method; and a glass substrate for which the adhesion of dust on the glass substrate end surface can be reduced on the basis of the processing method, and for which the occurrence of defects such as burning, chipping, and cracking can be prevented on a chamfered surface on the basis of the processing method. According to the glass substrate end surface evaluation method, the glass substrate end surface processing method, and the glass substrate, an image of an end surface (Z) taken with a laser microscope (14) undergoes black and white binarization processing whereby recesses that exist on the end surface are identified as white images, and mirrored surfaces on the end surface are identified as black images, and the characteristics of the end surface of the glass substrate are evaluated on the basis of the ratio of the area of the white images to the area of the black images. The characteristics of an end surface (Z) of a glass substrate (G) can be more accurately evaluated by this evaluation method than the evaluation methods of the prior art, which involve stylus profilometers, whereby the reliability of the accuracy depends on the size of the recesses that exist on an end surface (Z).
More Like This:
Inventors:
MIYAMOTO MIKIO (JP)
TORII HIDEHARU (JP)
KIMURA TOMONORI (JP)
TORII HIDEHARU (JP)
KIMURA TOMONORI (JP)
Application Number:
PCT/JP2011/053749
Publication Date:
January 12, 2012
Filing Date:
February 21, 2011
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
MIYAMOTO MIKIO (JP)
TORII HIDEHARU (JP)
KIMURA TOMONORI (JP)
MIYAMOTO MIKIO (JP)
TORII HIDEHARU (JP)
KIMURA TOMONORI (JP)
International Classes:
C03C19/00; G02F1/1333
Foreign References:
| JP2001259978A | 2001-09-25 | |||
| JP2005052944A | 2005-03-03 | |||
| JP2000017417A | 2000-01-18 | |||
| JP2004256838A | 2004-09-16 | |||
| JPH1192170A | 1999-04-06 | |||
| JP4370611B2 | 2009-11-25 | |||
| JP2002160147A | 2002-06-04 | |||
| JPH09102122A | 1997-04-15 |
Other References:
See also references of EP 2592057A4
Attorney, Agent or Firm:
OGURI Shohei et al. (JP)
Shohei Oguri (JP)
Shohei Oguri (JP)
Download PDF:
Claims: