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:
Mar. 11, 2003
Filed:
Mar. 26, 2001
Nikolaus Ingenhoven, Männedorf, CH;
Noa Schmid, Grabs, CH;
Stefano Fornito, Gossau, CH;
Werner Hälg, Männedorf, CH;
Tecan Trading AG, Männedorf, CH;
Abstract
The ejection orifice ( ) of a micropump including a baseplate ( ) of glass and a cover plate ( ) of silicon and intended for ejecting small liquid drops, has a diameter of about 50 &mgr;m, and is located in the center of a flat front surface ( ) which, in order to avoid accumulations of liquid in the region of the ejection orifice ( ), is only 8 times the area thereof and, along a continuous circular edge, is adjacent a lateral surface ( ) in the form of an envelope of truncated cone. The front surface ( ) and the lateral surface ( ) have a surface roughness of not more than N4 and are provided, for example, with a hydrophobic plasma polymer coating.