Reverse Engineering PWB Board ESD Effect

Reverse engineering PWB Board need to prevent the negative effect of ESD on them, in order to minimize the negative effect and have a better PWB Board reverse engineering outcome, below measures must be made to ensure the goal being achieved:

1. cabinet grounding track on the top and bottom shouldn’t print mask resist then it can be the discharge electrode for pwb board reverse engineering if the board is put outside of metal cabinet or shielding box;

2. Design a round grounding on the circuit when reverse engineering pwb board:

1> Loop circuit being placed when reverse engineering pwb board except the rim connector and cabinet grounding;

2> ensure all the annular ring width greater than 2.5mm when reverse engineering pwb board;

3> connect the annular ring by through vias each 13mm when reverse engineering pwb board;

4> connect the common grounding of multilayer circuit with annular ring grounding;

5> as for the double side pwb board installed outside metal cabinet or shielding, should put the annular ring grounding with common circuit;

3. Reverse Engineering PCB a grounding track aside each one of signal track in where the ESD can be penetrated directly;

4. I/O circuit should be reverse engineeringed to close the corresponding connector;

5. for those circuits which are more susceptible to ESD, should be reverse engineering in the centre area of pwb board, because other circuits can provide the protection for them;

 

6. reverse engineering series resistor and magnetic bead on the receiving terminal, as for those cable driver which is more liable to get shock by ESD, can also consider reverse engineering pwb board with resistor and magnetic bead at the receiving terminal;

7. instant protector normally should be placed on the receiving terminal of pwb board. Use the short and thick wire connect the cabinet grounding.

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