Nordson DAGE

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Ball shear

The ball shear test is one of the most common quality control tests undertaken  Electronic interconnects such as solder balls and wire bonds can be sheared individually using a tool accurately positioned above the device’s surface. Force and displacement are measured throughout the test. 

Ball shear image

Ball shear graph

The shear tool position during testing is critical for accurate and repeatable test results. Nordson DAGE cartridges  find the device surface using an sensitive touchdown feature. High precision positioning provides shear height accuracies of +/- 0.25 microns. Touchdown is achieved using a patented load cartridge clamping system which ensures every bond is sheared at the same height relative to the surface that it is bonded on.

US Patent 6,078,387 (07-019), US Patents 8,424,390 and 8,607,641 and European Patent 2,363,701 (08-062)
The typical ball shear standards are:

  • JEDEC JESD22-B116 - Au Ball Shear
  • JEDEC JESD22-B117 – Solder Ball Shear
  • ASTM F1269 - Ball Bond Shear
 
Accurate shear testing requires:
  • Precise multi-axis control
  • Repeatable shear height and test speed
  • Low landing forces (soft landing)
  • Firm clamping of the tool
  • Zero hysteresis

 

Exceptional Repeatability

The accuracy of the Dage shear test has independently verified using an optical profilometer. 

This shear height accuracy is also achieved on our rotational cartridges. Consistent height achieved regardless of direction of shear.

ball shear test

 

The Right Tools for the Job

Using the correct tool during testing is crucial for achieving consistency.  If the tool is too wide you may hit neighbouring bumps, and if the tool is too thin it may cut a channel directly through the bump.

The size and shape of the tool is important:

Ball shear testing Ball Shear test type

 

DAGE make a wide range of standard and custom tools to cover every application. Based on our years of experience we can advise which type of material to use for your test, and which size tool to employ. Dage only use the highest quality and purity materials to construct each tool. 

Tool image Range of tools

 

Failure Mode Characterization

Characterizing the failure mode is just as important as measuring the failure force. For example, brittle failures could record high forces, similar to ductile failures. Therefore, recording the failure mode is key to understanding the quality of the joint.

 

Failure mode image

Paragon software has a unique interface to allow fast and custom operator grading. Unique images (either graphics or real photos) can be uploaded to the software and the grade can be selected via touch screen or key pads.

Paragon Software Image