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:
May. 29, 1990
Filed:
Nov. 01, 1988
Shunichi Muto, Isehara, JP;
Tsuguo Inata, Isehara, JP;
Atsushi Takeuchi, Isehara, JP;
Yoshihiro Sugiyama, Atsugi, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A resonant tunnelling barrier (RTB) structure device (e.g., diode), having a large peak-to-valley current density (Jp/Jv) ratio, includes an InP substrate and a RTB structure structure. The RTB structure is formed by a first doped layer of InP or In.sub.0.53 GA.sub.0.47 As, a first barrier layer of Al.sub.x Ga.sub.1-x As.sub.y Sb.sub.1-y (0.ltoreq.x.ltoreq.1, y=0.51+0.05x), a well layer of InP or In.sub.z Ga.sub.1-z As (0.52.ltoreq.z.ltoreq.0.54), a second barrier layer of the AlGaAsSb, and a second doped layer of InP or In.sub.z Ga.sub.1-z As. The layers of the RTB structure are lattice-matched to InP.