pcb circuit board proofing and cutting size
■pcb circuit board proofing and cutting size
①Maximum panel size: 530*622mm (spray tin board: 450*622mm/MAX. Depending on the capacity of the equipment)
②Pay attention to the longitude and latitude of the board with more than six layers (must be the same), which can easily cause poor compression.
③ Size of reserved surface of multilayer board (8-10 layers of four-layer board 10-15 over six layers of mm)
④ Commonly used copper core board (0.2-3.2mm under 0.1mm radian), common board
inner/outer layer
pcb circuit board without copper core board (* * radian is 0.05-1.75mm) proofing positive
① 0.03mm(Hoz) compensation, copper thickness increased by 1oz, compensation increase 0.025mm
② Welding ring width requirement Hoz 0.15mm pth 0.18 (limit 0.13 0.16)
1 ounce (0.17mm depth 0.20)(limit 0.15 0.18)
2 ounce (0.19mm depth 0.22)(limit 0.17 0.20)
Copper thickness increase 1 ounce, compensation increase 0.02mm
③ Cutting copper wire: guaranteed minimum wire distance: 0.15mm from copper wire 0.4mm (0.3mm from PAD and wire)
copper hole: 0.250mm wire: 0.15mm pad: 0.2mm four-layer board
copper hole: 0.250mm wire: 0.18mm pad: 0.2mm above six-layer board
copper wire generated during copper extraction must be removed and small holes in copper skin must be filled.
For acyclic pth and NPth holes, 0.2mm of copper should be cut on one side. If the spacing cannot be ensured, drill twice.
PCB circuit board proofing
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Before designing multilayer circuit boards, the multilayer circuit board structure must be determined according to the circuit scale, circuit board size and electromagnetic compatibility (EMC) requirements. That is to decide whether to use a 4-layer, 6-layer or higher multilayer circuit board. Once the number of layers is determined, the multilayer circuit board factory has decided to determine the placement of the electrical layers in the multilayer circuit board and how to distribute different signals on these layers. This is the choice of multilayer circuit board factory laminated structure.
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