Stacking and bonding methods for forming multi-layer, three-dimensional, millimeter scale and microscale structures
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United States of America Patent
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Mar 20, 2018
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May 16, 2014
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May 7, 2002
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Embodiments are directed to methods of producing devices using modified multi-layer, multi-material electrochemical fabrication processes and/or using a laser cutting processes wherein individual layers or layer groups are formed and then stacked and bonded to produce prototypes or production parts. The methods can reduce the cost and lead time of prototyping when compared with previous multi-layer, multi-material electrochemical fabrication processes and can also reduce the lead time of production quantities, by allowing multiple layers of a multilayer device to be formed simultaneously, e.g. in parallel on the same wafer. Additionally, these methods may be used to extend the maximum height to which parts may practically be made. Finally, the methods allow geometries that are impossible, impractical or difficult to release (e.g. microfluidic devices such as pumps or parts with long, narrow channels) to be fabricated in multiple pieces and then joined after full or partial release.
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