What are the standards of PCB circuit boards, let's take a look at them together.
1. The shape should be as close to a square as possible, 2×2, 3×3, ... are recommended; but do not form a yin-yang board;
2, the width of the PCB board is ≤260mm (SIEMENS line) or ≤300mm (the FUJI line); if automatic dispensing is required, the width of the PCB board is ≤125 mm×180 mm;
3. The center distance between the small plates is controlled between 75 mm and 145 mm;
4. The outer frame (clamping edge) of the PCB circuit board jigsaw should adopt a closed loop design to ensure that the PCB jigsaw will not be deformed after being fixed on the fixture;
5. Four positioning holes are made at the four corners of the outer frame of the PCB circuit board, with a diameter of 4mm±0.01mm; the strength of the holes should be moderate to ensure that they will not break during the upper and lower boards; the precision of the hole diameter and position should be high, and the hole wall should be smooth No burrs
6. There should be no large components or protruding components near the connection point between the outer frame and the internal small board, and the small board and the small board, and there should be a space greater than 0.5mm between the components and the edge of the PCB circuit board. Ensure the normal operation of the cutting tool.
This is all about the standards of PCB circuit boards for everyone. I hope you have a new understanding of PCB circuit boards.
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What are the standards for PCB circuit boards? Release Time： 2021/3/29 19:23:36 |
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