- Flux print failure
- Condition
- Insufficient volume, unfilled or bridging during soldering.
Primary cause
- Physical Properties of Flux
Viscosity is the main physical property that affects printability.
If the viscosity is too low, the flux tends to bleed easily and cause bridging.
On the other hand, too high viscosity makes it difficult to fill the printing
area with flux, and lacking and unfilled areas are likely to occur.
-Printing Conditions
Printing conditions include squeegee material, squeegee angle, printing
pressure, printing speed, metal mask shape, clearance between substrate
and metal mask, and their separation speed.
It is necessary to optimize the conditions for both substrate and flux.
- Solution
Optimize the printing conditions.
Consider applying Arakawa flux fitting as the ideal properties.
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