Abstract
We proposed that the differential thermal gravimetry analysis (DTGA) for method of flux material development. The reaction of cupric oxide (powder) and the organic acid was exam-ined by DTGA as a model type corresponding to the metal oxidation membrane removal action which was a main flux action. The reaction with each change point was explained from the X-ray difraction of the sample corresponding to the change point of the heat behavior and the weight behavior. The fluxreaction temperature, the flux potency, the flux residue weight and the information of after-oxidation can be read from DTGA. The result showed that DTGA data guessed compatibility as the flux of the material. Also, we examined the influence given to solder or the substrate metal of organic acid system flux residue by a similar method.
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