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. 26, 2005
Filed:
Jun. 09, 2004
Robert L. Barry, Essex Junction, VT (US);
Peter F. Croce, Essex Junction, VT (US);
Steven M. Eustis, Essex Junction, VT (US);
Yabin Wang, Ithaca, NY (US);
Robert L. Barry, Essex Junction, VT (US);
Peter F. Croce, Essex Junction, VT (US);
Steven M. Eustis, Essex Junction, VT (US);
Yabin Wang, Ithaca, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and structure for a read only memory (ROM) cell array has the first drain of a first transistor connected to a true bitline and a second drain of a second transistor connected to a complement bitline. The first transistor also includes a first source, and the second transistor includes a second source. The connection of the first source or the second source to ground programs the ROM cell. With the invention, only the first source or the second source is connected to the ground and the other is insulated from electrical connections. Further, the connection of the source to ground comprises an electrical connection formed during manufacturing of the first transistor and the second transistor.