What are the inspection items before PCB casting? Today we will explain to you in detail:
一. In-group QA review
1. After receiving the board submission process, the QA in the group first confirms that the designer has completed a sufficient self-inspection, and returns to the process if it is not completed, and requires the designer to submit the process again after completion.
2. Review and record review results, handling opinions, etc. If the review fails, it will be returned to the designer.
3. The QA review opinions within the group are simultaneously filled in the single-board design review record database.
二. Check the problem of short circuit and open circuit
1. Be cautious when dealing with single-point grounding, hollowing out of the plane layer, and modification of pads and hot pads, and write the processing results into the ground-source segmentation of the design file, which is conducive to self-inspection and QA review And the next board change.
2. When the electrical strata of P software is negatively divided, it must be carefully checked. Here's how to check: Set PLANENETs assigned to the same layer to different colors. If there is a cross-split situation, you need to edit the PLANETHERMAL attributes of the pads and vias in the spanned area so that no faceplates are generated in this area, and then ensure its connectivity through wiring.
3. Where there are windows or slots, a wiring ban area must be added to prevent open circuits. The forbidden area defined in the structural element diagram must also meet the requirements.
4. The correct DRC must be set, and all DRC checks must be turned on.
The above is the content of the inspection items before PCB casting, do you know?
