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Process for manufacture of thick film hydrogen sensors

United States Patent

6,120,835
September 19, 2000
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A thick film process for producing hydrogen sensors capable of sensing down to a one percent concentration of hydrogen in carrier gasses such as argon, nitrogen, and air. The sensor is also suitable to detect hydrogen gas while immersed in transformer oil. The sensor includes a palladium resistance network thick film printed on a substrate, a portion of which network is coated with a protective hydrogen barrier. The process utilizes a sequence of printing of the requisite materials on a non-conductive substrate with firing temperatures at each step which are less than or equal to the temperature at the previous step.
Perdieu; Louisa H. (Overland Park, KS)
Honeywell International Inc. (Morris Township, NJ)
09/ 351,878
July 13, 1999
The U.S. Government has rights in this invention pursuant to contract DE-AC04-76-DP00613 with the United States Department of Energy.