Meaning
Supply chain management tracks alterations in the base substances used by secondary vendors to construct electronic assemblies. A sub tier semiconductor material change refers to a modification made by a supplier who provides raw materials to the primary component manufacturer. These changes often go unnoticed unless the primary vendor has a monitoring system in place.
Examples include a change in the chemical purity of the silicon wafers or the composition of the lead frame plating.
Traceability Path
Identifying the origin of every substance in a finished product is a complex task. A sub tier semiconductor material change requires the primary supplier to notify all downstream customers. This visibility allows the final manufacturer to understand the risk associated with the new material.
Reliability Evaluation
Long term performance can be affected by subtle changes in chemistry. An investigation into a sub tier semiconductor material change involves accelerated aging tests to see if the new material causes premature failure. Corrosion or metal migration are common concerns when the plating chemistry is altered.
Validation Scope
Testing requirements depend on the criticality of the component in the final product. When a sub tier semiconductor material change is detected, the quality team must decide if a full re-qualification is necessary. For safety critical applications, any change in the raw material requires a complete suite of tests.
This process ensures that the reliability of the system remains unchanged. Documentation of the results is stored to provide a record for future audits.
