Entry board for drilling
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United States of America Patent
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-
May 20, 2003
Grant Date -
Jan 10, 2002
app pub date -
May 30, 2001
filing date -
Jun 5, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An entry board for drilling improves drill machinability such as hole positional accuracy using a fine-diameter drill, and roughness of the walls of the drilled holes. The entry board has a metallic foil, and a thermosetting resin is covered on one or both sides of the metallic foil to provide a drill-penetrating layer.
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