LDT means Laser Direct Testing : it’s the core technology of Beamind, converting UV light of lasers into electricity.
The process consists of extracting electrons out of conductive pads (test points), but sink electrons into conductive pads as well, having an actual current flowing through traces allowing testing for Continuity and Isolation.
Beamind's LDT technology, as a Test process, is more than an Inspection process.
While Inspection processes only check the artwork of a single layer, Beamind's LDT technology checks all traces for shorts & opens, all through the layers stack of a substrate, including microvia-links, detecting this way 100% of the defects of the finished product.
Pr. Einstein once said : “Nothing is faster than light”.
From a physical point of view, moving light with high accuracy (apparently) seems to be much faster and easier than moving a mass (like flying probes) : when you think about it, what is lighter than light ?
Pr. Einstein is known for having had a great contribution for fundamental physics : he was awarded the Nobel Prize for its genius discovery of the photo-electric effect.
The photo-electric effect is the main physical phenomenon used in LDT technology. When a high energy photon meets an electron in a metal pad, the electrons becomes excited, and can escape with residual kinetic energy. Electrons movement means electrical current generation.
In this fashion, Beamind converts UV light from laser beams into electrical current in a full non-contact way to test IC Package substrates and other complex HDI PCBs for Opens & Shorts.
Beamind's exclusive Laser Direct Testing technology not only drives away electrons from trace-ends but is also able to return them back to trace-ends.
We apply a similar principle for the detection of shorts.
