Center Melt
The importance of centering your melt
1 min read
Centered Melt
Symmetrical vapor flux
Uniform deposition on all three domes
Consistent thickness with rotation
Designed tooling factor maintained
Shifted Melt
Vapor flux tilted toward one side
Dome on plume side receives thicker coating
Opposite dome receives thinner coating
Rotation helps average but may not fully correct non-uniformity
Tooling factor will change
Increased risk of crucible wall heating, spitting, or contamination
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