Solderability Test

Ensuring Solderability Issues Do Not Come Up During the Manufacturing Proccess

An important question to ask. "Is the component re-solderable?".

To verify this, solderability testing is conducted. Our tests align with JEDEC standards and will also verify that the parts will not have solderability issues in the manufacturing process.  


In order to help resolve any concerns or disputes between suppliers, a third-party arbitration service can also be offered by Toyoshima Green Tech to assure that any device has successfully gone through the tinning process successfully.


The surface tension of a fluxed component and vertical force of buoyancy that is immersed in molten solder is measure by the solderability test. 

The following is measured using our Solderability Test –


Time to Zero (Tb)

This is the amount of time the wetting curve takes to re-cross the zero line.


Time to Buoyancy (Ta)

This is the amount of time the wetting curve takes to re-cross the buoyancy line.


Time to 2/3 Fmax (T2/3)

This is the amount of time in seconds it takes for the force to reach 2/3 the maximum force.


Force at Time 1 + 2

This measures the force at predetermined points in the process.


Wetting Angle at Time 1 + 2

This measures the angle of the dip at a predetermined time during the process.

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ST 1.jpg

1) A stable electrical contact is guaranteed as a component that passes the solderability test will show reliable contact with a solid uniform bond. 


2) In order to prevent damage in components with a good solderability, the temperature used in the solder can be lowered. 


3) In order to reduce the risk of inducing damage to the heat-sensitive components, passing parts should only be at soldering temperatures for a short period of time.  

4) Solderability is cost-effective because it is less costly and much easier, in other words, more efficient to prevent poorly soldered parts from reaching production.