Electric test (E-test) ; a compulsory test for all our PCBs

Dedicated to provide printed circuit boards that meet your expectations, our company is committed to carry out controls throughout the manufacturing process. This allows us to consistently deliver high 

quality PCBs that meet your specs. To pursue excellence, we regularly upgrade our production equipment, carry many in-process control and right at the end, before packing, we carry out an electrical test.

100% of all our PCB will go through this procedure. During this simple test, we will check 2 main types of defaults; open circuits and shorts. Depending on customer’s requirement, we are also able to carry out other types of tests; typically a tension of 400V, an impedance control, a dimension CPK, etc.

E-test; flying probe or bed of nail?

Two types of equipment; flying probe and bed of nails can perform electrical tests on PCBs. In both cases, these tests are performed in our factory with the latest equipment.

The set up time of the flying probe method is fast, as it is basically only a software program that will suit the layout of your PCB. But the time required to test the PCBs is much longer as compared to a bed of nails. The obvious reason is that to test a board, the flying probes can only check one signal after the other.

The other testing option is the ‘bed of nails’. In this situation, we are developing a specific jig for your board. As per the name suggests, the bed of nails is a surface on which multiple test probes are positioned in order to test all signals of the PCB panel in one single operation. It takes longer to build and cost more, as numerous probes are required to cover the full surface of the delivery panel. Yet, once the tester is made, the actual testing cycle will only take a couple of seconds to be completed.

In light of what has been described here above, the decision of writing a program or to build a hardware is basically related to volume (or to be more specific, to test points) per manufacturing batch.

We have defined this limit at 3 sqm (30sqft). Any batch smaller then this volume will be tested by the flying probe method. For any production batch above this volume, we will set up a bed of nail. In some situation, we even set up a fully automatic testing line with auto-feeder.

Bed of mail or flying probe, testing is an essential step in our procedure to ensure best quality to our customers. Regardless of the size of the batch, we confirm that 100% of our PCBs are tested before leaving the factory.

PCB outgoing report

Whatever the size of the batch, no matter the complexity of the PCB, all our deliveries will have the following documents:

  • COC (Certificate of Conformity), which describe the specification and dimension of your PCB. 
  • Solderability/wetting test done on an actual PCB A micro section report delivered with the sample.
  • This also means that, in order to deliver you a single PCB, we must manufacture at least 2 pieces; as one as destroyed during these tests.
Depending on your requirements, these documents could be completed by:
  • An impedance control report
  • A CPK report for dimensions to be controlled
  • A PPAP report for automotive applications
Feel free to contact us, if you have more questions in this topic.