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:
Nov. 05, 2002
Filed:
May. 15, 2001
Peter Mischel, Heilbronn, DE;
Heike Peppermueller-Frangen, Heilbronn, DE;
Vishay Semiconductor GmbH, Heilbronn, DE;
Abstract
Optical detectors used for remote controls must be able to function over long distances and under various environmental conditions. They must therefore have a high sensitivity, which means they also respond to electrical and magnetic inference fields. The present optical detector avoids the need of being packed in an assembly, which has an additional internal metal shield for protection against electromagnetic interference. In this optical detector, the surface is coated with polysilicon, except for the top-lying cathode contact. Furthermore, a thick oxide layer is arranged between the substrate and the polysilicon coating, which is contacted to a highly p -doped region of the substrate. Such optical detectors, which are not subject to electromagnetic interference, are primarily required for remote controls.