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:
May. 30, 2006
Filed:
Oct. 14, 2003
Hilario OH, Rochester Hills, MI (US);
Hilario Oh, Rochester Hills, MI (US);
ASML Holding N.V., , NL;
Abstract
The invention allows a cluster tool to change from a first recipe to a second recipe, while preserving periodicity and ensuring that there are no delays at critical points. This procedure is referred to as recipe cascading. Cascading involves emptying a first lot of wafers off a cluster tool and populating the cluster tool with another lot of wafers, serially and simultaneously. The procedure is performed with no delays incurred at critical process steps; and with no additional robots and process modules other than those called for by the recipe and throughput requirements of the entering and the exiting lots. The entering lot may also have different recipes and throughput requirements from the exiting lot. A program residing on a computer determines a schedule for the cluster tool which enables recipe cascading. The program may use a genetic algorithm to determine the schedule, or any other optimization technique.