UST Poster

RUV: How It Works

A schematic of RUV system for crack detection in PV wafers and cells

Key components:

  • Transducer gives a frequency sweep;
  • Ultrasonic probe records resonance curve characteristics: (a) peak position, (b) amplitude, and (c) bandwidth;
  • Proprietary statistical algorithm gives "accept" or "reject" command;
  • Robotic grippers provide load and unload (RUV-2.2)
Frequency sweeps: Green curve is a normal wafer, Red curve is a cracked wafer
Download PDF - UST Poster