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, 2012
Filed:
Sep. 20, 2010
Katsunori Yahashi, Mie-ken, JP;
Masaru Kidoh, Mie-ken, JP;
Katsunori Yahashi, Mie-ken, JP;
Masaru Kidoh, Mie-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a nonvolatile semiconductor memory device includes first and second stacked structures, first and second semiconductor pillars, first and second memory units, and a semiconductor connection portion. The stacked structures include electrode films and first inter-electrode insulating films alternately stacked in a first direction. The second stacked structure is aligned with the first stacked structure in a second direction perpendicular to the first. The first and second semiconductor pillars pierce the first and second stacked structures, respectively. The first and second memory units are provided between the electrode films and the semiconductor pillar, respectively. The semiconductor connection portion connects the first and second semiconductor pillars and includes: an end connection portion; and a first protrusion having a side face continuous with a side face of the first semiconductor pillar. The semiconductor connection portion does not include a portion smaller than a diameter of the first semiconductor pillar.