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:
Mar. 26, 1985
Filed:
Dec. 21, 1981
Paul E Bakeman, Jr, Shelburne, VT (US);
Robert M Quinn, South Burlington, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for reducing the susceptibility of integrated circuit dynamic memory devices to environmentally produced radiation, such as alpha particles, in which a buried layer, having a majority carrier concentration substantially equal to or greater than the concentration of free carriers generated by the radiation and being between one and four orders of magnitude greater concentration than that of the semiconductor substrate, is ion implanted within a few microns of the substrate surface after at least one major high temperature processing step in the manufacturing process has been completed.