Keywords: Ultra small micro drill bit
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Journal Articles
Circuit World (2013) 39 (2): 75–81.
Published: 10 May 2013
...‐friendly PCBs, high aspect ratio drill bit, ultra‐small micro drill bit are described. Finally, the developments of geometry design and drilling process are reviewed. Findings To achieve excellent performance for drilling flexible PCB, a large helical angle, large flute/land ratio and small web...

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