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:
Nov. 17, 2009
Filed:
Oct. 16, 2006
Peter D. Nunan, Monte Sereno, CA (US);
Bret W. Adams, Newburyport, MA (US);
Peter D. Nunan, Monte Sereno, CA (US);
Bret W. Adams, Newburyport, MA (US);
Varian Semiconductor Equipment Associates, Inc., Gloucester, MA (US);
Abstract
A technique for matching performance of ion implantation devices using an in-situ mask. In one particular exemplary embodiment, ion implantation is performed on a portion of a substrate while the remainder is masked off. The substrate is then moved to a second implanter tool. Implantation is then performed on another portion of the same substrate using the second tool while a mask covers the remainder of the substrate, including the first portion. After the second implantation process, parametric testing may be performed on semiconductor devices manufactured on the first and second portions to determine if there is variation in one or more performance characteristics of these semiconductor devices. If variations are found, changes may be suggested to one or more operating parameters of one of the implantation tools to reduce performance variation of implanters within the fabrication facility.