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:
Jan. 23, 2001
Filed:
Jul. 29, 1998
Yoshihiro Sugiyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A quantum semiconductor device includes a plurality of intermediate layers stacked on each other repeatedly, each being formed of a first semiconductor crystal having a first lattice constant and including a plurality of quantum dots of a second semiconductor crystal having a second lattice constant different from the first lattice constant, the second semiconductor crystal forming thereby a strained system with respect to the first semiconductor crystal, each of the quantum dots in an intermediate layer having a height substantially identical with a thickness of the intermediate layer, each quantum dot in an intermediate layer aligning with another quantum dot in an adjacent intermediate layer in a direction perpendicular to a principal surface of the intermediate layer, each of the intermediate layers having a thickness equal to or smaller than a Bohr-radius of carriers in said intermediate layer, wherein the second semiconductor crystal contains N.