Inspection Qualifications

Since technology and applications seem to advance, it’s only fitting that Tekmos’ qualification testing advances as well. Within the last year, Tekmos has incorporated more reliability and qualification testing in our First Article Inspections, which brings customers more confidence and assurance for our design and manufacturing abilities.

Tekmos uses two generic qualification standards; MIL-STD-883 and JESD47. Both of these standards have compliance testing for the device’s Electrical Capability, Environmental Strains, Life Potential, and Package Assembly Integrity. These tests allow the device to be looked at from all angles and predict whether the device can survive under typical stresses seen in the semiconductor industry. However, some testing is dependent on the final application of the device. If the final application is prone to jolt movements but rarely exposed to alternating extreme temperatures, then a focus on the Package Assembly Integrity testing; I.E. Bond Pull Strength, Bond Shear, and Die Shear, might be more beneficial than the Environmental Strains; I.E. Temperature Cycling. Another testing dependent could be from a Product Change Notice (PCN). If a PCN is sent due to a Wafer Design Change, then it would be more useful to perform Electrical Capability testing rather than Package Assembly Integrity. Of course, if any time a customer desires a full qualification, then Tekmos will be happy to accommodate.

Incorporating these qualification tests has come with learning curves and challenges. One main challenge was our project management process had to be revamped to keep up with the additional testing. Majority of the qualification tests are performed by outside suppliers, which means there needs to be extra precaution on lead-time agreements, material management, cost evaluations, and final review of reports. As the Director of Quality, I have taken these new additions to project management as my responsibility. Within the last few months, I have been beta testing a new tool that captures all steps in the qualification process, as well as tracks lead-times and cost trends. Tekmos is hoping this implementation will reduce human error risks, and accurately assess upcoming qualifications.

A key player in our Qualification Testing has been our Product Engineer, Zachary Kolb. He was hired back in April of 2019 and has been the main person involved in First Article Inspections. Along with receiving my many pestering, if not annoying emails and phone calls, he is the mastermind behind the qualification tests performed at Tekmos. He is responsible for coordinating information and material with our suppliers, setup and testing of inhouse qualifications, and report generating. He has been a great asset to Tekmos and continues to help maintain structure and organization in device qualifications.

Kelsey Casto, Director of Quality