What are the factors of sulfur-free paper storage
In order to prevent the oxidation of sulfur-free paper , the PCB will precipitate silver during this process, so the PCB is also called an immersion silver board. The silver plating process has become one of the important methods for the outer surface treatment of printed circuit boards. But there is a strong affinity between sulfur-free paper silver and sulfur. When encountering hydrogen sulfide gas or sulfide ions, it is easy to produce silver salts (Ag2S) that are difficult to dissolve in the air.
Because the deposition speed of silver is very fast, a low-density silver precipitation layer is formed, so the copper under the silver layer is easy to contact with the air, so it needs more and more thick Silver plating layer can achieve oxidation resistance. This means that a thicker silver layer needs to be deposited in the production of sulfur-free paper, which increases production costs and increases the possibility of weldability problems, such as micro-gaps and poor weld quality. If you touch the silver plate, you need to wear sulfur-free gloves.
During the observation and transfer process, the immersed silver plate needs to be separated from other objects with sulfur-free paper. At the end of the specified 8 hours, the silver plate needs to be separated from the packaging bag with sulfur-free paper . When removing the package from the silver-plated wire.
dust-free printing paper manufacturers, sulfur-free paper manufacturers and sulfuric acid paper manufacturers tell you the intention of using sulfur-free paper as follows:
sulfur-free paper itself does not contain sulfur and will not react with the appearance of PCB silver layer.
dust-free printing paper manufacturers, sulfur-free paper manufacturers and sulfuric acid paper manufacturers tell you the precautions for sulfur-free paper storage:
sulfur-free paper is stored in a gentle cold air warehouse to prevent direct sunlight, keep away from fire and water sources, pay attention to prevent high temperature, moisture and prevent contact with liquids (especially acid and alkali). The body of the PCB is copper. The copper layer is very simple. The reaction produces dark brown cuprous oxide. Dustless Notebook Also note.
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