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:
Apr. 03, 2001
Filed:
Nov. 12, 1999
Frederick William Kern, Jr., Colchester, VT (US);
Donald Joseph Martin, Fairfield, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention is a method and apparatus for mechanically bonding a polymer to a convex surface of a substrate to provide intimate contact therebetween for improved energy transport between a transducer on one side of the substrate and a chemical bath on the other. The polymer seals the surface of the substrate from the chemical bath and may have a low adhesion to the substrate. A thin film of the polymer is brought under a tensile stress to provide intimate physical contact with most of the area of the convex surface. In one embodiment, the tensile stress is achieved by providing polymer as a liquid on the convex surface and then cooling to take advantage of differential thermal contraction between the polymer and the substrate to achieve the tensile stress in the polymer.