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. 02, 2001
Filed:
Sep. 08, 1998
Lee Biing-Jye, Hsin-Chu, TW;
Jou Ming-Jiunn, Hsin-Chu, TW;
Jacob C. Tarn, Hsin-Chu, TW;
Chuan-Ming Chang, Hsin-Chu, TW;
Liu Chia-Cheng, Hsin-Chu, TW;
Epistar Co., Hsin-Chu, TW;
Abstract
A nitride light emitting diode is fabricated on a transparent sapphire substrate. The LED is then mounted upside-down on a conductive silicon substrate with a bottom electrode to serve as the output terminal for the cathode of the LED. The LED die is partially etched to expose the anode of the LED, where a top electrode is formed. In comparison with conventional LED structure with both electrodes located on top of the die, moving one electrode to the bottom allows more light to be transmitted upward and reflects the light incident downward. For equal amount of light emission, the new structure occupies less area.