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:
Jul. 28, 2009
Filed:
Jan. 31, 2006
Tomoko Koyama, Hara-mura, JP;
Tomoko Koyama, Hara-mura, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A surface-emitting type device includes a rectification section including a substrate and a first semiconductor layer formed above the substrate, an emission section including a second semiconductor layer of a first conductivity type formed above the rectification section, an active layer formed above the second semiconductor layer and a third semiconductor layer of a second conductivity type formed above the active layer, and a photodetection section including the substrate, a photoabsorption layer formed above the substrate and a contact layer formed above the photoabsorption layer, wherein the first semiconductor layer and the contact layer are formed by a common process, the rectification section and the emission section are electrically connected in parallel with each other, and the rectification section has a rectification action in a reverse direction with respect to the emission section.