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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.:

US 9662731 B1

PDFFull Text
Date of Patent:
May. 30, 2017

Filed:

Jan. 20, 2015

Reflow oven and methods of treating surfaces of the reflow oven

Applicant:

Illinois Tool Works Inc., Glenview, IL (US);

Inventors:

Douglas T. Ngai, Diamond Bar, CA (US);

Joo Yong Tay, Singapore, SG;

Wen-Feng Liu, Naperville, IL (US);

Roberto P. Loera, Chicago, IL (US);

Steven Dwade Cook, Vega, TX (US);

Assignee:

Illinois Tool Works Inc., Glenview, IL (US);

Attorney:

Lando & Anastasi, LLP

Primary Examiner:

Saeed T Chaudhry

Int. Cl.
CPC ...
B23K 3/04 (2006.01); B23K 1/20 (2006.01); H05K 13/00 (2006.01); F27B 9/34 (2006.01); F27D 1/00 (2006.01); H01L 21/67 (2006.01); H05K 13/04 (2006.01); B23K 1/008 (2006.01); F27B 9/30 (2006.01); F27B 9/32 (2006.01); F27D 1/16 (2006.01); F27D 17/00 (2006.01); B23K 1/00 (2006.01); B23K 3/08 (2006.01); C09D 133/00 (2006.01); F27D 7/04 (2006.01); H01L 21/677 (2006.01); H05K 3/34 (2006.01);
U.S. Cl.
CPC ...
B23K 3/04 (2013.01); B23K 1/008 (2013.01); B23K 1/0016 (2013.01); B23K 1/203 (2013.01); B23K 3/082 (2013.01); C09D 133/00 (2013.01); F27B 9/3077 (2013.01); F27B 9/32 (2013.01); F27B 9/34 (2013.01); F27D 1/1678 (2013.01); F27D 7/04 (2013.01); F27D 17/008 (2013.01); H01L 21/6776 (2013.01); H01L 21/67173 (2013.01); H05K 13/0465 (2013.01); H05K 3/3494 (2013.01);
Abstract

A reflow oven includes a chamber housing including surfaces that are in contact with heated air mixed with contaminants, including flux, and a water-soluble layer selectively applied to the surfaces of the chamber housing. Embodiments of the reflow oven include an acrylic-based layer, such as an acrylic paint. In one embodiment, the acrylic paint includes a water-soluble polymer, a polymer emulsion, and water. The water-soluble polymer includes butyl benzyl phthalate. In some embodiments, the acrylic paint includes 1-10% by weight butyl benzyl phthalate, 30-55% by weight acrylic polymer emulsion, and balance water. In a certain embodiment, the acrylic paint includes 1-5% by weight butyl benzyl phthalate, 35-50% by weight acrylic poly emulsion, and balance water. Methods of treating surfaces of the reflow oven are further disclosed.

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