Clean Technology, Vol.14, No.2, 103-109, June, 2008
솔더페이스트로 솔더링 후 잔류 플럭스 오염물에 대한 준수계 세정제의 금속치구를 이용한 세정성능 평가방법 연구
A Study on the Evaluation Methods of Residual Flux Cleaning Ability by Alternative Semi-Aqueous Cleaners Using Metal Test Tools After Soldering with Solder Paste
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초록
본 연구에서는 솔더페이스트(solder paste)로 솔더링후 표면에 잔류하는 플럭스(flux)의 효과적인 세정성능 평가방법 개발을 목적으로 하였다. 솔더링시 플럭스의 퍼짐오차를 줄이기 위해 본 연구에서 고안한 금속치구를 이용하여 1,1,1-TCE 및 플럭스 제거용 몇 가지 대표 준수계 대체세정제에 대하여 세정시간에 따른 플럭스 제거율을 무게측정법으로 측정, 비교하였다. 세정시간 변화에 따른 각 세정제의 세정효율을 측정한 결과 측정값들의 상대표준편차(RSD)가 약 4% 이하로 data의 신뢰성이 확인되었다. 따라서 솔더페이스트로 솔더링후 대체세정제의 잔류플럭스의 세정성능 평가시험에 본 연구에서 적용한 금속치구(metal test tool)를 이용한 평가방법이 유력한 방법으로 적용가능할 것으로 판단된다. 그리고 이 평가방법을 적용한 결과 현재 상용화 되어 있는 우수하다고 알려진 몇 가지 대표 준수계 대체세정제 중 ST100SX와 750H가 고활성 플럭스에 대한 세정력이 우수한 성능을 나타냈으나 기존의 1,1,1-TCE에 비해서는 현저히 떨어짐을 확인할 수 있었다.
In this study, in order to develop evaluation method of the cleaning efficiency of residual flux which remains on the surface after soldering with solder paste, a specially designed metal tool is used to reduce spread uncertainty of flux while soldering. Using this tool, the measurement of cleaning efficiency of flux after soldering for some typical alternative semi-aqueous cleaners and 1,1,1-TCE by weighing method was conducted. As the test result of cleaning efficiency for each cleaner at several different cleaning times, the precision of the data is confirmed to within about 4% relative standard deviation (RSD) range. So, it is considered that this would be a good evaluation method for evaluating the cleaning efficiency of the residual flux which remains after solder paste soldering in the alternative cleaning. The results of this test method shows that the cleaning efficiency of ST 100SX and Neozal 750H in the cleaning of residual flux was better than other semi-aqueous cleaners, but its cleaning efficiency was clearly inferior to 1,1,1-TCE.
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