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. 26, 1995
Filed:
Feb. 08, 1995
Applicant:
Inventors:
Electra Gizeli, London, GB;
Adrian C Stevenson, Cambridge, GB;
Assignees:
Fisons plc, Ipswich, GB;
GEC Marfoni Limited, Ipswich, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436527 ; 73587 ; 73590 ; 73645 ; 73649 ; 310311 ; 310312 ; 3103 / ; 3103 / ; 3103 / ; 3103 / ; 310316 ; 310317 ; 310318 ; 310319 ; 310327 ; 310334 ; 310340 ; 310345 ; 310363 ; 310367 ; 422 8201 ; 426518 ; 426524 ; 426149 ; 426806 ;
Abstract
A chemical sensor includes a piezoelectric support (1) capable of supporting a shear horizontal wave provided on its surface with an electrode (2,3). The sensor is characterized in that the surface of the piezoelectric support (1) including the region bearing the electrode (2,3) is covered by a layer of dielectric material (9) of thickness 0.5 to 20 microns. The piezoelectric support (1) is preferably a single crystal. The dielectric layer (1) may be of, for example, silicon dioxide or a suitable polymer, and preferably has a thickness of between 0.5 and 5 .mu.m.