Gemini Quality Tracking

GEMINI is an identification and tracking system for multi-crystalline ingots, wafers and cells. It is camera-based and uses the natural grain structures in the poly-Si material for calculation of several different characteristic measures. These characteristic measures together give a finger print, the WafID which is

• unique,
• non-marking and
• non-contacting,

allowing identification and tracking from raw wafers to finished cells.

The main areas of application of GEMINI are

• Block reconstruction
  Reconstruct wafer position in the original ingot (accuracy approx ± 5 mm)

• Wafer and Cell tracking
  Track wafers from the raw wafer to the end of the module fabrication line

• Claim handling
  Verify that wafers have been produced in a specific factory

Advantages and customer’s benefits

• Non-marking
• Wafer position in ingot and crystal analysisavailable
• Very competitive costs (no additional cameras, PCs, setups)
• No additional space
• High recognition rate (>98%)
  

Data Sheet GEMINI Block Reconstruction

Data Sheet GEMINI Tracking

Data Sheet GEMINI Stand-alone System