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:
Jan. 24, 2006
Filed:
Aug. 27, 2004
Eiji Sakagami, Yokkaichi, JP;
Eiji Sakagami, Yokkaichi, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A NOR type semiconductor storage comprising memory cells, word lines, local and main source lines of metal and bit lines is disclosed. Two adjacent cells on a column form one set and share the drain region. Two adjacent cell sets on a column share the source region. Cell columns are isolated by trench type element isolation regions. A local source line run on and is connected to the source regions of the cells on a row. The main source lines are arranged intermittently between the bit line columns and are connected to the local source lines. A height of embedded layers in the element isolation regions under the local source lines or a height of a portion of the embedded layers contacting the substrate is lower than an upper surface of the source regions under the local source lines. The local source lines are connected to the well region.