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Causes of yellowing of tactile switches after reflow soldering

Release time:2018-08-31    Clicks: Click

 
Why do we use the tactile switch to turn yellow after reflow soldering? In order to solve this problem, let us introduce you to answer questions.
威尼斯城娱乐官方平台
What is the reason why customers feel that the touch switch is yellow after over furnace or over reflow?
1. After the engineer's research and analysis, will cause light touch switch yellowing after reflow welding mostly using 6T plastic material, because 6T plastic material itself is relatively easy to absorb moisture, if the plastic absorbs less moisture, it is estimated that the button in the heat after the change is not obvious, but if the absorption of more moisture, the color will be very much changed. It's obvious. But it doesn't affect the function and life of the key itself, because it only changes the appearance color of the key.
2. Many customers mistakenly believe that the button is not heat-resistant, but it is not. If it is not heat-resistant, the performance is plastic base deformation or plastic base melting and deforming shrapnel and other symptoms.
3. if the customer is concerned that such a situation will affect the quality of the touch switch, we recommend that the customer use LCP material.
4. because the LCP material is brittle, and it is not easy to absorb water, so it will not change color after over reflow.
The above is the explanation about the yellowing of the touch switch.
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