A customer on the touch switch in the oven or after reflow soldering why will turn yellow? What is the reason?
1. After the engineer's analysis, will cause the touch switch yellowing after reflow mostly using 6T plastic material, because the 6T plastic material itself is relatively easy to absorb water, if the plastic to absorb less water, it is estimated that The key changes after the heat is not very obvious, but if more moisture absorption of the discoloration is very obvious, but the function of the key button itself and life is not affected, because the change is only the appearance of the color button.
2. There are many customers mistakenly believe that the key is not high temperature, is not .If not high temperature performance is the plastic base deformation or plastic base melting and shrapnel deformation and other symptoms.
3. If the customer is still worried that such a situation will affect the quality of the touch switch, we recommend that customers use LCP material.
4, because the LCP material is relatively brittle, not easy to absorb moisture so that after reflow will not appear discoloration this phenomenon.