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. 11, 2009
Filed:
Dec. 27, 2006
Jung-dal Chol, Gyeonggi-do, KR;
Jong-sun Sel, Gyeonggi-do, KR;
Chang-seok Kang, Gyeonggi-do, KR;
Abstract
Nonvolatile memory devices, and methods of forming the same are disclosed. A memory device includes a substrate having a cell region, a low voltage region and a high voltage region. A ground selection transistor, a string selection transistor and a cell transistor are in the cell region, a low voltage transistor is in the low voltage region, and a high voltage transistor is in the high voltage region. A common source contact is on the ground selection transistor and a low voltage contact is on the low voltage transistor. A bit line contact is on the string selection transistor, a high voltage contact is on the high voltage transistor, and a bit line is on the bit line contact. A first insulating layer is on the substrate, and a second insulating layer is on the first insulating layer. The common source contact and the first low voltage contact extend to a height of the first insulating layer, and the bit line contact and the first high voltage contact extend to a height of the second insulating layer.