Journal
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
Volume 14, Issue 8, Pages 1230-1233Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/14/8/016
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A new method of micromachining hollow needles and two-dimensional needle arrays from single crystal silicon is described. The process involves a combination of fusion bonding, photolithography and anisotropic plasma etching. The cannula produced with this process can have design adjustable bevel angles, wall thickness and channel dimensions. A subset of processing steps can be employed to produce silicon blades and lancets with design adjustable bevel angles and shaft dimensions. Applications for this technology include painless drug infusion, blood diagnosis, glucose monitoring, cellular injection and the manufacture of microkeratomes for ocular, vascular and neural microsurgery.
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