Die and production method thereof, glass substrate and production method thereof and method of forming pattern on the glass substrate
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Nov 2, 1999
filing date -
Dec 24, 1997
priority date (Note) -
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Abstract
On the pressing surface of a die, a first protrusion having a substantially triangular cross section and a second protrusion having a length which is greater than a width thereof and a substantially trapezoidal cross section in planes extending through both length and width dimensions thereof are provided. By press forming, a groove with a substantially V-shaped cross section to mount an optical part, and a groove with a substantially inverse-trapezoidal cross section providing an alignment marking are formed, being inverse-transferred in correspondence with the respective protrusions on one principal surface of a glass substrate. Forming such a pattern on a glass substrate produced with a die enables alignment of the glass substrate with a mask for photolithography with high accuracy.
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