Browse Prior Art Database

Sealant Removal Machine

IP.com Disclosure Number: IPCOM000051062D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Fellows, CJ: AUTHOR [+3]

Abstract

Machine 10 removes sealant debris from the surfaces and plated through holes (PTHs) of printed circuit boards (PCBs) or panels and the like.

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Sealant Removal Machine

Machine 10 removes sealant debris from the surfaces and plated through holes (PTHs) of printed circuit boards (PCBs) or panels and the like.

An anaerobic material is applied to epoxy-glass PCBs under vacuum to force the material into the cracks and hollow fibers within the PTHs of air solidifies, thereby plugging the PTHs.

To remove the plugging material, the PCB or panel (not shown) is placed on a filter media transport belt 1 which ia reversibly driven by drive mechanism 2. The panel is moved back and forth by the belt beneath the upper wiper blade 3 and air knife 4 and over the lower vacuum chamber 5 located under transparent cover 6. The combination of the wiper blade 3 and air knife 4 removes the unwanted anaerobic material from the upper panel surface, and the vacuum chamber pulls the plugging material out from the PTHs through the lower panel surface. The removed material passes through the filter media belt 1 for appropriate disposal. Periodically, the panel is flipped over for removal of the unwanted material on the other surface of the panel.

The machine can also be modified to remove other types of debris, e.g., broken pieces or chips produced during the drilling operation associated with the making of the PTH openings and the like, and/or to provide drying operations on the panel.

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