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:
Jan. 03, 1995
Filed:
Jan. 11, 1993
Samuel P Kounaves, Winchester, MA (US);
Gregory T Kovacs, Stanford, CA (US);
Christopher W Storment, Cupertino, CA (US);
Tufts University, Medford, MA (US);
Leland Standard Univ., Stamford, CA (US);
Abstract
An electrode assembly for use in quantifying the levels of various metals in an aqueous solution. In one embodiment, the electrode assembly comprises a substrate, the substrate being a silicon chip upon which a layer of silicon dioxide has been grown. A plurality of gold bond pads and gold interconnect traces are deposited by microphotolithography onto the silicon dioxide layer. An array of iridium deposits are then patterned by microphotolithography onto the interconnect traces at predefined locations. A passivation layer is deposited by plasma enhanced chemical vapor deposition over the finished metallization to electrically insulate it from external solutions. Plasma etching is then used to expose at least a portion of each of the iridium deposits. Just prior to analytical use, one or more of the exposed iridium elements are electroplated with mercury. The present invention is also directed to a field deployable sensor including the above-described electrode assembly.