Idle question - board capacitance

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metermannd

Joined Oct 25, 2020
191
Has anyone ever dug into the capacitance introduced by adding internal VCC / ground planes into a PC board and whether the capacitor formed by the two planes has a measurable value compared to that of the bypass capacitors normally placed on a given board?

Just curious.
 

ronsimpson

Joined Oct 7, 2019
1,230
I worked on a project for a while where we measured the capacitance of each trace on a PCB to see if it was good. (looking for trace-trace shorts or opens) Board testing is done at the PCB factory.
Short thin traces have very low capacitance.
 
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