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:
Dec. 04, 2018
Filed:
Mar. 15, 2018
Winbond Electronics Corp., Taichung, TW;
Winbond Electronics Corp., Taichung, TW;
Abstract
Provided is a memory device including a substrate, a source region, a drain region, a source contact, a drain contact, at least two stack gates, and at least two selection gates. The source region and the drain region are both located in the substrate. The source contact is located on the source region and the drain contact is located on the drain region. A bottom area of the drain contact is greater than a bottom area of the source contact. The stack gates are located on the substrate at two sides of the source region respectively. The selection gates are located on the substrate at two sides of the drain region respectively. A distance between the selection gates located at two sides of the drain region is greater than a distance between the stack gates located at two sides of the source region.