DRILLING IN STRETCHED SUBSTRATES
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United States of America Patent
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app pub date -
Sep 26, 2008
filing date -
Sep 26, 2007
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Abstract
The present invention provides a method and apparatus for drilling a plurality of holes in a stretched substrate in at least two directions not in the same plane, including providing a substrate in a substrate holder, stretching the substrate in at least one direction to a stretched configuration, and drilling at least one hole in the substrate while in a stretched configuration. The present invention further provides methods and apparatus for drilling impinging jet nozzles in stretched or pre-stretched substrates.
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