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On-Line Cleaning of Any Fluorinated Soldering Liquid Used For Vapor Phase Soldering

IP.com Disclosure Number: IPCOM000099773D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

DeMarco, JL: AUTHOR [+3]

Abstract

Disclosed are a process and the equipment for implementing same for on-line removal of spent rosin flux and acid byproducts (HF/HCL) from all types of fluorocarbon soldering liquid/vapor-phase soldering machines.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

On-Line Cleaning of Any Fluorinated Soldering Liquid Used For Vapor Phase Soldering

       Disclosed are a process and the equipment for
implementing same for on-line removal of spent rosin flux and acid
byproducts (HF/HCL) from all types of fluorocarbon soldering
liquid/vapor-phase soldering machines.

      Vapor-phase soldering machines, depending on the respective
manufacturer, operate employing a single- or double-component system.
   -    Single-component systems operate using a fluorocarbon liquid
as the heat medium during soldering operations.
      -    Double-component systems operate using a fluorocarbon
liquid for the heat medium and a chlorofluoro solvent as a
containment blanket for the fluorocarbon liquid during soldering
operations.

      During soldering operations, rosin flux from the product being
soldered dissolves into the fluorocarbon liquid.  The fluorocarbon
liquid and the chlorofluoro solvent (if used) break down into HF and
HCL.  The spent rosin flux, if not removed, will saturate the
fluorocarbon liquid and carbonize on the heater elements of the
solder machine, thereby retarding heat transfer.  The HF/HCL
byproducts, if not removed from the condensed vapor, will corrode the
solder machine and product.

      The drawing illustrates and describes the cleaning/associated
equipment involved in this process.