Title:
METHOD OF BORING GLASS SUBSTRATE AND GLASS SUBSTRATE FOR PLASMA DISPLAY MANUFACTURED BY THE METHOD
Document Type and Number:
WIPO Patent Application WO/2008/044771
Kind Code:
A1
Abstract:
A first hole of a predetermined depth is formed in a glass substrate by pressing
a first drill against the lower surface of the glass substrate while rotating
the first drill. A second hole is formed in the glass substrate by pressing a second
drill against the upper surface of the glass substrate at the position facing
the first hole while rotating the second drill. A through-hole is formed in the
glass substrate by connecting the first hole with the second hole. Since the
first and second holes are overlapped with each other in the thickness direction
of the glass substrate, a step part formed on the inner peripheral part of the through
hole is positioned on the upper surface side higher than the center of the glass
substrate in the thickness direction.
Inventors:
HANADA SHOTARO (JP)
ZHENG SHENGJI (JP)
ZHENG SHENGJI (JP)
Application Number:
PCT/JP2007/069997
Publication Date:
April 17, 2008
Filing Date:
October 12, 2007
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
HANADA SHOTARO (JP)
ZHENG SHENGJI (JP)
HANADA SHOTARO (JP)
ZHENG SHENGJI (JP)
International Classes:
B28D1/14; H01J11/02
Foreign References:
| JPS52106189A | 1977-09-06 | |||
| JP2003080410A | 2003-03-18 | |||
| JP2000311616A | 2000-11-07 | |||
| JP2005116349A | 2005-04-28 | |||
| JPH05200729A | 1993-08-10 |
Attorney, Agent or Firm:
OGURI, Shohei et al. (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)
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