
PCB circuit board proofing and cutting size
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- Time of issue:2020-09-22 16:46
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PCB circuit board proofing and cutting size
■PCB circuit board proofing and cutting size
①Maximum panel size: 530 * 622mm (spray tin plate: 450 * 622mm / MAX. It depends on the equipment capacity)
②Pay attention to the problem of the latitude and longitude of the board with more than six layers (must be the same), which can easily cause poor compression.
③The size of the reserved surface of the multilayer board (8-10 layers of four-layer boards 10-15 over six layers mm)
④Commonly used boards containing copper core (0.2-3.2mm under 0.1mm radian), common boards without copper core (** radian of 0.05-1.75mm)
Inner/outer layer
PCB circuit board proofing is positive
①0.03mm (Hoz) compensation, copper thickness increased by 1oz, compensation increased by 0.025mm
②The width of the welding ring requires Hoz 0.15mm pth 0.18 (limit 0.13 0.16)
1 ounce (0.17 mm depth 0.20) (limit 0.15 0.18)
2 ounces (0.19 mm depth 0.22) (limit 0.17 0.20)
The copper thickness is increased by 1 ounce, and the compensation is increased by 0.02 mm
③Cutting the copper wire: ensure the minimum wire distance: 0.4mm to 0.15mm from the copper wire (0.3mm from the PAD and the wire)
Copper hole: 0.250mm line: 0.15mm pad: 0.2mm four-layer board
Copper hole: 0.250mm line: 0.18mm pad: 0.2mm above the six-layer board
The copper wires generated during the copper extraction process must be removed, and the small holes in the copper skin must also be filled.
For ringless pth and NPth holes, 0.2mm copper should be cut on one side. If the distance cannot be ensured, drill twice.
The evaluation system of the circuit board factory should follow the following principles
The use of soft and hard circuit boards?
Soft and hard circuit board production process
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