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Browse Prior Art Database

Gas Purge Window for Controlled Atmosphere Soldering

IP.com Disclosure Number: IPCOM000115042D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 84K

Publishing Venue

IBM

Related People

Hoffmeyer, MK: AUTHOR [+2]

Abstract

Disclosed is a custom designed gas purge window assembly system that can be attached to commercial thermode soldering tools to provide for controlled atmosphere soldering capability.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Gas Purge Window for Controlled Atmosphere Soldering

      Disclosed is a custom designed gas purge window assembly system
that can be attached to commercial thermode soldering tools to
provide for controlled atmosphere soldering capability.

      A specially designed heated gas purge window, controller, gas
flow rate, and delivery system was developed to provide for
controlled atmosphere thermode soldering capability on existing,
commercially available thermode soldering tools.

      Figs. 1 - 4 are included for additional clarification.  For a
bonding system, the gas window tool is bolted to a bonder stage (K).
In the process, the gas window (E)  automatically drops into position
over a stage (L) possessing parts to be soldered by a resistance
heated thermode (F) attached to a commercial bonding tool (not
shown).  The gas window is actuated via air regulation and a throw
cylinder (H) which controls vertical motion of the tool attached to
slider arm (I).  X-Y motion for positioning adjustments of the window
are provided on slider arm table (J).  The gas window ((E), and Fig.
4)), delivers a purge of hot inert or reactive gas mixture to the
part surface thru slots (O) in the gas window, that are formed by
coupling of cover (N) to the window base.

      The gas enters the window thru a feeder pipe (G) coupled to
window arm (M) and is uniformly heated as it passes thru window
chamber (Q) filled with ceramic beads.  Heat is supplied to the
window and gas via resistance elements embedded in machined holes
(P).  The use of this heating system supplies ex...