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:
Aug. 06, 2013
Filed:
Jul. 08, 2011
Yue-shiun Lee, Taipei, TW;
Cheng-hsiung Chen, Taipei, TW;
Meng-fan Wang, Hsinchu, TW;
United Microelectronics Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
The present invention provides a differential varactor device including a substrate having a first conductive type, a well having a second conductive type, five doped regions having the second conductive type, a first gate, a second gate, a third gate, and a fourth gate. The well is disposed in the substrate, and the doped regions are disposed in the well and arranged along a direction. The first gate, the second gate, the third gate and the fourth gate are respectively disposed on the well between any two of the adjacent doped regions, and are arranged sequentially along the direction.