Testing and inspection
Which technique models defects such as transistor shorts and opens inside standard cells based on each cell's circuit and generates test patterns for them?
- AVisual inspection
- BCell-aware test
- CIDDQ test only
Show answer and explanation
Answer: B. Cell-aware test
Traditional fault models such as stuck-at focus only on cell input and output pins. Cell-aware test simulates transistor-level defects inside cells and generates patterns to detect them. It helps reduce field failures from intra-cell defects, which have increased in fine processes.
- A. Visual inspection cannot find internal electrical defects.
- B. Correct. It models defects inside cells.
- C. IDDQ detects defects through supply current but is separate from modeling intra-cell defects.