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:
Jun. 29, 2010
Filed:
Dec. 09, 2004
Thomas J. Miller, Woodbury, MN (US);
Michael A. Haase, Saint Paul, MN (US);
Xiaoguang Sun, Woodbury, MN (US);
Thomas J. Miller, Woodbury, MN (US);
Michael A. Haase, Saint Paul, MN (US);
Xiaoguang Sun, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A semiconductor device is provided comprising a first potential well located within a pn junction and a second potential well not located within a pn junction. The potential wells may be quantum wells. The semiconductor device is typically an LED, and may be a white or near-white light LED. The semiconductor device may additionally comprise a third potential well not located within a pn junction. The semiconductor device may additionally comprise absorbing layers surrounding or closely or immediately adjacent to the second or third quantum wells. In addition, graphic display devices and illumination devices comprising the semiconductor device according to the present invention are provided.