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:
Feb. 22, 1994
Filed:
Nov. 15, 1991
SGS-Thomson Microelectronics s.r.l., Milan, IT;
Abstract
Each common source region of the cells of a row of a FLASH-EPROM matrix may be segmented and each segment is individually connected to a secondary source line patterned in a second level metal layer by a plurality of contacts between each common source region and patterned portions of a first level metal and through as many interconnection vias between the latter patterned portions of the first level of metal and the relative secondary source line patterned in the second metal layer. The secondary source lines are brought out of the matrix orthogonally to the bit lines and may be connected to a dedicated selection circuitry, thus permitting the erasing by groups or banks of cells of the FLASH-EPROM memory.