The Electrical test process of rigid PCB
Why we should electrically testing rigid PCB?
There were many reasons to electrically testing rigid PCB.
The big one reason is due to ensure meet customers’ requirement.
At the end of the rigid PCB production process, most factories will electrically test.
Use probe tester or mould to compare with original rigid PCB design data.
This paper will from above two points to discuss about the electrical test process of rigid PCB.
The flying probe test method of rigid PCB
Usually we will use flying probe test prototype rigid PCB.
One reason is the flying probe testers in most rigid PCB plant’s QS are easy to set up.
Because all flying probe testers don’t need a test fixture to finish.
And the second reason is due to flying probe test cost very low for prototype rigid PCB boards.
The electrical test worker will use a flying probe tester to check each net of rigid PCB.
To ensure the test rigid PCB circuits were complete or no open circuits, and does not short to any other net circuits.
But there was another disadvantage is that flying probe test process require long time to finish.
This means testing every rigid PCB net is very slow.
The mould electrical testing method of rigid PCB
This is a faster electrical test method to compare with flying probe testing rigid PCB.
The electrical test mould used 4000 tiny probes or more numbers of tiny probes to connect rigid PCB net circuits.
Due to the electrical mould tester builds an electronic map of the rigid PCB from a pre-tested good prototype rigid PCB board.
Then use the mould tester to compare each board to be tested with its map.
So this electronic testing method very fast.
And most of rigid PCB production, manufacture will use the mould electrical testing method.