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:
Sep. 05, 2000
Filed:
Feb. 26, 1999
Andrew J Hazelton, San Carlos, CA (US);
John K Eaton, Stanford, CA (US);
Nikon Corporation, , JP;
Abstract
An outer wall temperature of an enclosure containing a heat source, such as a coil array of a linear or planar motor, e.g. for driving a photolithography wafer positioning stage, is controlled by an insulating coolant flow in an intermediate channel. Laminar flow provides a thermal boundary layer having a thickness smaller than the channel height, which minimizes heat transfer, thereby effectively 'insulating' the outer wall from the heat source. Excess heat is removed by turbulent coolant flow in a second channel. The two channels can be connected in series. Variations provide cooling of two-sided heat sources. To support the outer wall, posts extend through openings in the channel walls and are attached to a base plate. An insulating barrier surrounds each post in the turbulent flow channel, thereby minimizing heat transfer to the posts. To minimize turbulence in the insulating flow channel, the post has an airfoil shape.