Grinding pin for grinding machines comprising resin bonded selections of rough grit and fine grit
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United States of America Patent
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May 25, 2004
Grant Date -
Jan 2, 2003
app pub date -
Aug 1, 2002
filing date -
Feb 2, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A grinding pin (53) for grinding notches in the edges of disc workpieces, such as semi-conductor wafers, comprises a metal spindle (132) for mounting in a grinding machine, and an adjoining cylindrical region having axially spaced sections of fine grit (160) and rough grit (162), the latter being axially nearer the spindle (132). In use on a grinding machine having a rotatable forming wheel, similar profiled notch-grinding grooves (140) and (142) are formed by the wheel in the grinding sections (162) and (160) respectively.
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