PCB production process requirements [PCB copy board PCB's puzzle format]
Update date：2012-9-26
Often require puzzle production in the PCB production process, but often did not pay attention because some of the details, or do not know, which leads to the final puzzle problem, below is summed up in the production process, for everyone to share.
1) the size of the puzzle is not too large, nor too small, ease of processing, manufacturing, assembly and testing process does not produce large deformation is appropriate.
2) craft gripping the edge of the puzzle and the installation process hole PCB manufacturing and installation process should be OK.
3) on every block puzzle design reference mark, the machine block puzzle as veneer look to improve the placement accuracy.
4) puzzle can be used stamp version or double the face carved V-shaped cell separation technology. Stamps Edition, you should pay attention to take the edge should
Evenly distributed in each puzzle around to avoid welding PCB uneven force leading to deformation. , V-shaped arrangements when the V-shaped grooves using double face engraved depth should be controlled at around pull a thickness of l / 3 (both sides of the profile depth), requires groove precise size, depth uniformity.
5) designed double-sided mounting wave soldering the PCB can be used double the number of puzzle positive and negative half, shaped by the same arrangement of both sides of the group, so you can improve equipment utilization (equipment investment in small and medium-volume production under the conditions can be reduced by half), saving the cost and time of production preparation.
6) In order to avoid the impact of component placement, more stringent process requirements for surface mount PCB warpage.
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