Quality control of subcontractor management in wafer foundry

Semiconductor manufacturing process is becoming more and more complex. Therefore, many integrated circuit design houses are transforming direct supply chain management to wafer foundry subcontract management for backend supply lines. The service provided by foundry is known as turnkey service. To ensure the quality of packaged product, a robust backend subcontractor quality control system is quite important for foundry. In this article, we introduce the establishment of the quality system, which includes the stages of subcontractor qualification, production monitoring, and periodical review. The methodologies used in each stage are described. The collaboration between foundry and backend subcontractor enhances the supply chain operation. The overall quality level meanwhile has been significantly improved.