During PCBA manufacturing, conformal protective coating is customary applied to protect the circuit. Different coating is applied depending on specification requirements. The coatings range from a simple water soluble dust protection (typically, < 20μm) to specialized hydrophobic coatings (<1 μm).
MProbeVis MSP enables measurement of the coating thickness directly on the PCBA to avoid cost and inaccuracy of using test coupons. The measurement can be done on different areas of the PCBA, including on SMT elements surface to verify uniformity and thickness of the coating. There is, frequently, significant difference between coating thickness on coupon and on actual product. Measuring thin film thickness directly on PCBA makes a big difference in yield of the final product. The measurement is, typically, done using 40 μm or 20 μm measurement spot in the Visible/Vis-NIR range (400-1000 nm).
Why use MProbeVis MSP?