Today, Xiaobo passed by the company front desk at work and saw the new receptionist Manman scratching her head and ear. The kind-hearted Xiaobo took the lead in helping. Previously, a customer called to inquire about solder mask, which may be a bit unclear for newcomers in the industry.

So what exactly is solder mask?

Solder mask layer, on the surface, is a layer of solder mask material set on a circuit board to achieve the purpose of dividing the areas that need to be soldered and not soldered. Reflow soldering isSMTAn important component of assembly, it allows electronic components to be soldered onto a circuit board. The solder mask layer can prevent the occurrence of welding bridges in the covered area，This allows for more precise components to be soldered onto precision pads. If a solder mask is not used, copper traces will adhere to the solder paste. This situation occurs in many manually assembled circuits. It may also cause a short circuit, which can affect functionality and reliability. In fact, the solder mask layer has other functions, such as insulation, temperature and corrosion resistance, protection of the circuit, prevention of oxidation, matching thickness, etc.

We usually divide solder mask into solder mask and solder mask, which is a thin layer that covers copper traces.

Solder resist is generally used for hard materialsPCBMost colors are green, so it is commonly referred to as the green ink layer (referred to as the green oil layer). In fact, it can also be mixed into other colors of solder resist, such as white, black, yellow, blue, red, etc. With the increasing demand for aesthetic craftsmanship in the market, more and more colors of solder resist are being applied to circuit boards. Ink is printed on a circuit board using screen printing technology, and after curing treatment, it is firmly attached to the boardPCBOn the board.

andflexibilityCircuit board(Flexibility)PCB）Due to the soft nature of its substrate, solder mask is generally used, and there are many colors available, including transparent, yellow, white, and black. This type of low-temperature material, which uses polyimide as the primary material, is calledPETHigh temperature resistance is calledPI,It has excellent insulation, moisture resistance, high temperature resistance, and welding resistance. The covering film is tightly adhered to the copper-clad board (flexible circuit board substrate) by laser cutting and vacuum pressing.

In short, whether it is ink or cover film, they are divided into various specifications and models according to material, function, and thickness. Our engineers will design high-quality products using materials that match different scheme requirementsPCBAnd flexible circuit boards.

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