Substrate having V-shaped grooves having multi-angled V-shaped grooves and manufacturing method therefor
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United States of America Patent
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Issued Date -
Aug 8, 2002
app pub date -
Feb 7, 2001
filing date -
Mar 26, 1999
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
To provide a substrate having V-shaped grooves having multi-angled V-shaped grooves in which a slant face of the V-shaped grooves has two or more angles. A cross section of the V-shaped grooves is formed so that the angle that a straight line forming a groove above a contact point of a fiber with the V-shaped grooves makes with a tangential line at the contact point is an acute angle smaller than 180 degrees. The cross section of the V-shaped grooves may be formed so that the angle that a straight line forming a groove below a contact point of a fiber with the V-shaped grooves makes with a tangential line at the contact point is an acute angle smaller than 180 degrees. The substrate having V-shaped grooves having a slant face shape with two or more angles can be manufactured by grinding a glass substrate by using a diamond grinding stone having several types of tip end angles.
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