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:
Oct. 23, 2007
Filed:
Jun. 23, 2006
Jih-wei Liou, Hsinchu, TW;
Jih-Wei Liou, Hsinchu, TW;
United Microelectronics Corp., Hsinchu, TW;
Abstract
The present invention discloses a triple well structure, which includes a substrate of a first conductive type, a deep buried well of a second conductive type, a well of a first conductive type, a well ring of a second conductive type, and a well ring of a first conductive type. The deep buried well of the second conductive type is in the substrate. The well of the first conductive type is disposed over the deep buried well of the second conductive type in the substrate. The well ring of the second conductive type surrounds the well of the first conductive type. The well ring of the first conductive type is between the well of the first conductive type and the well ring of the second conductive type.