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:
Sep. 01, 1992
Filed:
Mar. 02, 1990
Yasunori Tokuda, Amagasaki, JP;
Noriaki Tsukada, Amagasaki, JP;
Abstract
A light responsive semiconductor device includes a p-i-n structure incorporating a multiple quantum well structure buried within the intrinsic layer and an external resistance and voltage source serially connected across the device for adjusting a critical wavelength at which the light absorption characteristic of the device dramatically changes. By properly choosing the resistance and/or voltage, the photocurrent changes discontinuously at the critical wavelength and the photocurrent exhibits a hysteresis characteristic. A light responsive structure may include individual, serially aligned p-i-n devices or an integrated, unitary semiconductor body inculding a plurality of p-i-n devices.