• DE wetting -
Materials Solderability Problem
Insufficient/ Inactive Flux
• Bridging -
Insufficient/ Inactive Flux
Low Soldering Temperature
PCB Layout
• Blow Hole -
Poor Quality PCB
Preheat Setting too low
Baking Process
• Solder Skip
Materials Solderability
Insufficient/ Inactive Flux
Solder Wave
Warp PCB