Ball array mask and ball array mask supporting apparatus
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United States of America Patent
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Nov 6, 2012
Grant Date -
Feb 25, 2010
app pub date -
Aug 20, 2009
filing date -
Aug 21, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A ball array mask includes: a metal mask, which includes through holes into which minute balls are inserted, and which is positioned at a location above an object to be mounted; a hollow frame; a stretchable sheet, edges of the metal mask being affixed to the hollow frame by the stretchable sheet; and projection members that are attached to respective corners of the metal mask so as to pull the metal mask outwardly.
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