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. 09, 2004
Filed:
Jun. 22, 2000
Joachim Schneider, Unterhaching, DE;
Anton Pfefferseder, Sauerlach-Arget, DE;
Andreas Hensel, Vaihingen, DE;
Ulrich Oppelt, Zorneding, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An optoelectronic gas sensor based on optodes, where multiple separate photosensitive elements and an opto-transmitter located centrally between them are integrated into or onto a semiconductor substrate is characterized in that the photosensitive elements lie in one plane in the substrate, and together with a lateral emission area of the opto-transmitter emitting light laterally, they are covered by sections of the optode material whose thickness and refractive index are selected so that light emitted laterally from the emission area is guided to the photosensitive elements by total reflection in the optode material in each transmission branch. Such a chip-shaped gas sensor based on optodes can be implemented in a very small design, e.g., in an area of 2×2 mm and a thickness of 250 &mgr;m.