The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2016
Filed:
Mar. 24, 2014
Applicants:
Puneet Khanna, Clifton Park, NY (US);
Shekhar Bhansali, Tampa, FL (US);
Inventors:
Puneet Khanna, Clifton Park, NY (US);
Shekhar Bhansali, Tampa, FL (US);
Assignee:
University of South Florida, Tampa, FL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/302 (2006.01); A61M 37/00 (2006.01); B44C 1/22 (2006.01);
U.S. Cl.
CPC ...
A61M 37/0015 (2013.01); B44C 1/227 (2013.01); A61M 2037/0053 (2013.01);
Abstract
Microneedles with sharpened tips are fabricated without any reduction to the shaft diameter below the tip. By sharpening the tip and not the entire length of the microneedle, their mechanical strength is maintained. The microneedles are fabricated out of a wafer substrate using lithography and deep reactive-ion etching (DRIE). By controlling the timing of the DRIE as the photoresist depletes, the sharpness and angle of the tips are controlled.