Frit voltage as support for the establishment of a cleanliness specification
Stefan Strixner
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Brief Insight
Increasing requirements for reliability and durability make technical cleanliness a critical factor in electronics manufacturing. This white paper explains how cleanliness specifications can be defined in a practical way, how deviations can be assessed, and how complementary methods such as frit voltage analysis can be used effectively.
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Article number: EN-2603-02
Whitepaper
Frit voltage as support for the establishment of a cleanliness specification
Abstract
What should be done if there are no or unrealistic cleanliness specifications or if these cannot be met during ongoing production?
Technical cleanliness (TecSa) has played a central role in the automotive industry for years and is becoming increasingly important due to progress in electromobility (e.g. in battery management systems and inverters) and autonomous driving (camera systems). However, the increasing demands on reliability and durability require ever stricter measures along the entire supply chain to prevent particle-related failures.
To ensure this, industry standards such as VDA 19, ISO 16232 as well as the ZVEI guideline "Technical cleanliness in electrical engineering" and the IEC TR 61191-7 require consistent implementation of TecSa concepts. These guidelines not only support the performance of particle analysis, but also help to efficiently design processes and procedures along the value chain and minimise risks.
A key point of reference for this is a product-specific cleanliness specification which, however, is often not (yet) available in practice or cannot be realised based on the current state of the art.
The following article presents a possible approach to establishing a cleanliness specification and dealing with outliers, with a particular focus on the frit voltage analysis method as a supporting measure.
Key Topics
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Problem/Dilemma cleanliness specifications
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Suggestion for a possible practical approach
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Frit voltage analysis
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Results Discussion
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Stefan Strixner
Technology Analyst
Stefan Strixner studied Technical Chemistry at the Technical University Georg Simon Ohm in Nuremberg. Since 1992 he has been working at ZESTRON Europe, with varying emphases. As Principal Engineer, he is responsible for setting up the technical and analytical centres worldwide.
He is also an expert in the field of failure causes, reliability and technical cleanliness of electronic assemblies. As part of his work in the ZESTRON Reliability & Surfaces Team, he organises and conducts Technology Coaching sessions on these topics.