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. 08, 1980
Filed:
Jan. 31, 1978
Applicant:
Inventor:
Vincent L Rideout, Mohegan Lake, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 41 ; 357 23 ; 357 45 ; 357 59 ; 357 89 ; 357 51 ;
Abstract
In a one transistor, one capacitor N-channel polysilicon gate MOSFET RAM, having self-aligned contacts to silicon gates, an N-implant is used to both form bottom electrodes of the capacitors and to form depletion mode FET channels in peripheral circuits. Separate polysilicon layers are used for the gates of enhancement mode FETs and for the capacitor upper electrodes and depletion FET gates.