PCB ASSEMBLY INSPECTION AND TESTING
We inspect your printed circuit boards at various stages of the manufacturing/assembly process for early detection of faults. Correcting defects at an early stage improve yields during the PCB testing stage. We use visual inspection, automated optical inspection (AOI) and automated X-ray inspection. After the boards have been manufactured and have passed all the PCB assembly inspections they are ready for testing.
Common PCB assembly defects are
Open and short
Insufficient or excess solder
Missing components
Misaligned components
Wrong orientation
Defective components
PCB assembly testing is an integral part of our manufacturing process. There is a variety of PCB assembly testing methods. The most common ones are
In-Circuit Testing (ICT)
Flying Probe Testing
Burn-in Testing
Functional Testing
Benefits of Function Testing Include
By simulating the operating environment it eliminates the need for expensive PCB testing such ICT, flying probe and burn-in testing.
It helps detect and correct faults at various staging of manufacturing.
It helps to address potential issues early before going into final production, saving time and money.
Prototyping
First stage of the PCB, proof of concept. Focused on functionality and demonstrable product. Board bring up and debug straight off the assembly line.
Shorts and open test on voltage rails
Basic confirmation of functionality & 'Board Bring Up
Basic power test supplies for stability and spec
Measure clocks & oscillators
Start test fixture (also known as jig) spec during this phase (You can provide your test fixture or we can develop one for you).
Rev A
Fix the first issues identified in Prototyping stage. Additional features check. Expand areas of test.
Program devices
Unblock functionality test
AC and DC measurement
Jitter & accuracy
Run diagnostics if available
Basic environmental tests
Test fixture development starts during this phase
Rev B
Expanded test procedures to include reliability testing at temperatures to accelerate life time testing Pilot Functional Testing.
Program devices
Unblock functionality test with some boards
AC and DC measurement with some boards
Jitter &accuracy with some boards
Run diagnostics with some boards
Test fixture development occurs during this phase
RAMP
Expanded test procedures to include reliability testing at temperatures to accelerate life time testing Pilot Functional Testing.
Program devices
Unblock functionality test with some boards
AC and DC measurement with some boards
Jitter & accuracy
Run diagnostics if available
Basic environmental tests
Test fixture development starts during this phase
High Volume
Failure analysis is an ongoing process throughout which ensures continuous improvements and yield.
Start using test fixture
Run diagnostics jig randomly pull and test some boards
Run Functional Test
Our goal at Pacific EMS LLC is to achieve customer satisfaction with superior service and quality products. As your partner, communication is a vital element of a quality product and together we can determine the most effective solutions to meet your needs.