source:News release time:2023-06-07 Hits: Popular:PCB Assembly company
(1) Wallplower stack
a. Cause heavy pores, caused broken drilling and holes due to drilling in a number of drilling.
b. Among the multi -layer boards, there are both connectors and isolation disks at the same position.
(2) The graphical layer is not standardized
a. Violation of conventional design, such as component surface design on the Bottom layer, welded surface design on the top layer, causing people to misunderstand.
b. There are many design garbage on each layer, such as disconnect, useless border, labeling, etc.
(3) The characters are unreasonable
a. Character covers SMD welding slices, which brings inconvenience to PCB interrupt detection and component welding.
b. The characters are too small to make the screen printing difficulty. Too too will make the characters overlap each other, it is difficult to distinguish, the font is generally> 40mil.
(4) Single pad pads set the aperture diameter
a. Single -sided pads generally do not drill holes, and their pores should be designed as zero. Otherwise, when drilling data is generated, the coordinates of the hole appear in this position. If the drilling hole should be special.
b. If a single -sided pad must be drilled, but the pores are not designed, the software uses the pad as a SMT pile when the output power and strata data are designed, and the inner layer will be thrown away.
(5) Draw pads with filling blocks
Although this can be checked by DRC, the welded data cannot be generated directly during processing, and the pads cover the welded agent cannot be welded.
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