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Isotropic Tensioning Frames for Handling Metal Foils

IP.com Disclosure Number: IPCOM000084259D
Original Publication Date: 1975-Oct-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Goldman, OH: AUTHOR [+4]

Abstract

Thin copper and other metal alloy foils are commonly used as the base material for the fabrication of various screening masks. The handling of the foils during the various masking, etching and developing processes during fabrication present handling problems. Frequently, mask damage occurs when uneven tension is applied to hold the foil in a flat, tensioned position.

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Isotropic Tensioning Frames for Handling Metal Foils

Thin copper and other metal alloy foils are commonly used as the base material for the fabrication of various screening masks. The handling of the foils during the various masking, etching and developing processes during fabrication present handling problems. Frequently, mask damage occurs when uneven tension is applied to hold the foil in a flat, tensioned position.

In this fixture, a stainless steel frame 10 has stainless steel corner brackets 12 provided with fixtures at the ends thereof, to hold and support the foil 14 to be processed. The foil 14 conventionally has holes punched in the corners thereof which receive the bolt portion 16 of brackets 12. A nut 18 secures the foil to the bracket.

This fixture has the advantage that it prevents the foils from twisting and flapping in strong mechanical environments, such as encountered during spray rinsing, developing or in forced air drying ovens. In addition, the outer edges of the foil 14 which are the most prone to damage are protected. Tension can be applied to the foils either by the structure of the frame 10 itself or to tensioning devices in the brackets 12.

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