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:
Jul. 30, 1991
Filed:
Nov. 01, 1989
Applicant:
Inventors:
Chih-Yuan Lu, Lower Macungie Township, Lehigh County, PA (US);
Tah-Kang J Ting, Upper Macungie Township, Lehigh County, PA (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 235 ; 357 2311 ; 357 41 ; 357 42 ; 357 46 ; 357 59 ; 365185 ;
Abstract
A compact, high speed EEPROM is disclosed. The design features mirror-image pairs of cells with a common junction buried under a thick oxide. The oxide also supports a portion of the control and floating gates. A single erase gate, also above the oxide, is capable of erasing two rows of cells at once. Each cell also has a second junction which contacts the semiconductor substrate surface. The second junction has a conductive landing pad which facilitates small cell size.