Adaptive Management Techniques for Optimized Burn-In of Safety-Critical SoC

The cost of Burn-In is a major concern for the testing of Automotive Systems-on-Chip (SoC). This paper highlights problematic aspects of a Burn-In flow and describes a two-layered adaptive technique that permits to optimize the stress application and strongly reduce BI test time. At the SoC level, the described methodology adaptively copes with FLASH erase time uncertainties; at the Automatic Test Equipment (ATE) level, the strategy relies on power monitors and tester intelligence. The paper reports experimental results on a SoC manufactured by STMicroelectronics; figures show an optimized usage of stress resources and demonstrates a reduction of 25% of the BI test time when using the proposed adaptive techniques

An Optimized Test During Burn-In for Automotive SoC

The cost of Burn-In is a major concern for the testing of Automotive Systems-on-Chip (SoCs). This paper proposes an optimized Test-During-Burn-In (TDBI) flow that takes advantage of the parallel execution of several types of stress procedures in which many components are carefully interleaved. The proposed methodology permits to significantly reduce the BI time and enables production monitoring by providing detailed test data-logging capabilities helping the debug of potential yield issues largely caused by the ageing of Burn-In tester consumable parts. The paper describes an experimental scenario about TDBI of an automotive SoC manufactured by STMicroelectronics