Comparative study on proper thermocouple attachment for vapour phase soldering profiling

Attila Géczy, Bíborka Kvanduk, Balázs Illés, G. Harsányi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Purpose - The paper aims to present a comparative study of various thermocouple (TC) attaching methods for the proper measurement of soldering temperature profiling during vapour phase soldering (VPS). The heat transfer process during VPS is different from common methods, while the required heat for reflow is provided by the condensation. The condensate is a flowing layer on the board, where the dynamic behaviour also affects the local conditions on the surfaces. Temperature measurements based on TCs are also affected this way; it is important to investigate the process for deeper understanding. Design/methodology/approach - Bare printed circuit boards (PCBs) were prepared for standard K-Type TCs attachment with industry standard materials: kapton polyimide tape, aluminium tape, SMD adhesive and high-temperature solder (HTS). Heating experiments were performed in a batch-type VPS oven with Galden LS240 fluid and fixed oven parameters. Findings - According to the specific attachment requirements, HTS and Alu-tape are the suggested methods for better profiling reliability and repeatability. Alu-tape is the preferred all-around method, for fast, exchangeable, cheap, reliable and repeatable profiling in a VPS oven. It was presented that the heating factor (Q?) gives more reliable comparison overview; the time period-based comparisons may be affected by the thermal inertia, while heating factor also includes temperature conditions at the given time points. Originality/value - The paper presents the reliability of the presented methods for VPS and present suggestions for the use of different TC ends and attaching materials during condensation heating of the PCBs. Also a new approach on profiling data evaluation based on the heating factor is presented and suggested for wider use.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalSoldering and Surface Mount Technology
Volume28
Issue number1
DOIs
Publication statusPublished - Feb 1 2016

Fingerprint

soldering
Soldering
thermocouples
Thermocouples
attachment
Vapors
vapor phases
Tapes
tapes
ovens
Heating
Ovens
heating
printed circuits
circuit boards
solders
Printed circuit boards
Soldering alloys
Condensation
condensation

Keywords

  • Reflow soldering
  • Thermal profiling
  • Thermocouple
  • Thermocouple attachment
  • Vapour phase soldering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Comparative study on proper thermocouple attachment for vapour phase soldering profiling. / Géczy, Attila; Kvanduk, Bíborka; Illés, Balázs; Harsányi, G.

In: Soldering and Surface Mount Technology, Vol. 28, No. 1, 01.02.2016, p. 7-12.

Research output: Contribution to journalArticle

Géczy, Attila ; Kvanduk, Bíborka ; Illés, Balázs ; Harsányi, G. / Comparative study on proper thermocouple attachment for vapour phase soldering profiling. In: Soldering and Surface Mount Technology. 2016 ; Vol. 28, No. 1. pp. 7-12.
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