How to prevent the windows of the membrane switch from being scratched, the connection of the membrane switch to the display window, and the user’s requirements for the transparency of the windows are very strict and no defects are allowed, in particular, users sometimes use the quality of the glass to check the display window of the membrane switch. Remember someone said that the user is always right, how do we control the window membrane switch? First of all, we should have a high degree of quality awareness, strict control of all production links. The window and the key of the membrane switch are a whole, the key production process is complex, the flow is many, every production link of the membrane switch must consider to protect the window from scratch. Control raw materials, transparency and scratch test levels for purchased raw materials.