Printed circuit board manufacturing method - silk screen

What is silk screen? The silk screen describes the markup points required for the surface of the printed circuit board to facilitate assembly of the assembly and better understand the circuit board design. For example, part numbers and contours, manufacturers' marks, and information such as production date. The most common silk print color is white. Which layer of GERBE is silk screen? In Gerber, topoverlay and bottomoverLay are the top and bottom edges of the silk print layer. Silk print is important for welding. You must pay attention to the details. 1. All components, mounting holes and positioning holes should be labeled for easy board installation. For example, the mounting holes are laminated with H1, H2 ......... HN or the like. 2. In order to reduce the likelihood of reverse welding, the screen printing should follow the principle from left to right, from the bottom to the right. Since the electrolytic capacitors, diodes, and other polar devices in each functional unit should remain as much as possible. 3. To ensure the reliability of the welding equipment, do not perform silk screen on the component pad. In order to ensure the continuity of tin, the tin rail does not require silk screen. In order to facilitate the insertion and maintenance of the equipment, the device should not be hidden by the number of bits in the installation device. 4. When opening the welding window, it is best not to put the wire into the through hole, holes, and pads to avoid loss of a portion of the wire. As shown in the figure below, the "8" of the silk screen is printed on the hole, and the hole is cut off. After receiving the substrate, you may not be able to grasp the numbers. 5. The polarity of the components and the direction of the connector should be displayed on the filament layer to make the label polarity easily identify. 6. The device identifier on the board must match the BOM table list identifier. Read more

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