PCB Silk Screen Printing on Metal

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Silkscreen printing, also known as serigraphy, is a metal finishing process. It involves applying a specific design and paint to a metal surface using blades, squeegees, and a fine polyester mesh. To prevent any ink from smudging on the metal, a stencil is used to cover the sections that are not meant to be printed on. This ensures a perfect and precise printing outcome.

A printed circuit board (PCB) design consists of multiple layers, and the topmost layer is called silkscreen. It is typically applied at the end of the PCB manufacturing process and printed on the PCB surface. Each PCB has at most two silkscreen layers, one on the top side and one on the bottom side. These layers provide reference marks for components on the PCB.

Silkscreen is a non-conductive epoxy ink that is specially formulated for PCB printing. It is commonly white, but other colors such as yellow, blue, black, and red are also used. There are various other types of inks used in PCB production, but this article mainly focuses on PCB screen printing ink. Silkscreen printing is used to mark parts, testing points, PCB elements, warning signs, and tabs with a layer of oil traces. It provides useful information based on schematic diagrams to help manufacturers and engineers locate and identify all components during assembly. It is used to highlight element values, PN numbers, test points, and so on. 1. The minimum distance between the copper foil and the board edge is 0.5mm, the minimum distance between the component and the board edge is 5.0mm, and the minimum distance between the pad and the board edge is 4.0mm.

2. The minimum gap between copper foils is 0.3mm for single-sided boards and 0.2mm for double-sided boards. (Pay attention to the components of the metal shell when designing the double panel. The shell needs to be in contact with the PCB board when plugging in. The top pad cannot be opened, and it must be sealed with silk screen oil or solder mask.)

3. Jumpers are not allowed to be placed under the IC or under the components of potentiometers, motors and other large-volume metal casings.

4. Electrolytic capacitors are not allowed to touch heating components. Such as transformers, thermistors, high-power resistors, radiators. The minimum distance between the radiator and the electrolytic capacitor is 10mm, and the distance between the remaining components and the radiator is 2.0mm.

A printed circuit board (PCB) design consists of multiple layers, and the topmost layer is called silkscreen. It is typically applied at the end of the PCB manufacturing process and printed on the PCB surface. Each PCB has at most two silkscreen layers, one on the top side and one on the bottom side. These layers provide reference marks for components on the PCB. Silkscreen is a non-conductive epoxy ink that is specially formulated for PCB printing. It is commonly white, but other colors such as yellow, blue, black, and red are also used. There are various other types of inks used in PCB production, but this article mainly focuses on PCB screen printing ink.

Silkscreen printing is used to mark parts, testing points, PCB elements, warning signs, and tabs with a layer of oil traces. It provides useful information based on schematic diagrams to help manufacturers and engineers locate and identify all components during assembly. It is used to highlight element values, PN numbers, test points, and so on.