What is the soldering mask?
The solder mask is a shield that prevents melted lead from holding non -target metals during soldering traffic. In the operations of the solder plate with a printed circuit, the goal is to create a conductive path between the conductive pad and the part line. The solder mask ensures that no unintended abbreviations are created in the process. An empty plate with printed circuit is a thin sheet glued to the insulator plate, such as glass fibers or epoxy resin. Priticed circuit board is first processed by means of an acidic mask to define tracks or electrical wires that remain when the plate is immersed in copper -secreting acid, such as iron chloride, in a process called etching. After etching, the board is cleaned and then printed with both labels and a solder mask or solder to resist only the connection points. First, it is first applied with one side of the printed circuit plate with a etched mask that exposes copper laminates to be removed. Maskova remains by the action of acidno portion.
After mounting the components on the printed circuit board, it is preheated and ready for soldering. The connection on the underside of the board can undergo a process called wave soldering, where the molten lead comes into contact with exposed connecting pads, which are usually metallically affected copper. If the solder mask has not been used, long runs of individual tracks are short -circuited in the soldering process.
Mass production in the production of electronics uses the film Masks for the preparation of boards for soldering. The liquid solder mask is useful for printing a mask using Silkscreen or other printing methods. Epox -type solder masks can be more durable than the Lakuer Masks sold.
The etched board will look like an insulating sheet with lines, which are patterns of copper conductors. The next step may be the printing of the soldering mask. The advice can then be drilled to match any components they need. U oneIsland printing districts is the only choice to use components through holes.
As soon as the components are mounted, other wires will be cut on the trace side. The next step is usually soldering the wool, which preheatches the plate and allows the wool of the molten line to the procedure through the bottom of the plate with the perimeter. In this process, the advice is completely soldered in a few seconds, even with hundreds of soldered points.