Extraction Challenges of CFET and Backside Power Delivery
Summary
Semiconductor Engineering has published analysis on the parasitic extraction challenges associated with Complementary FET (CFET) transistor architectures and backside power delivery networks, two of the most significant structural changes in sub-2nm semiconductor process nodes. The piece addresses workflow setup, interface resistance modeling, and RLCK (resistance, inductance, capacitance, and coupling) extraction as critical enablers for next-generation device reliability and power efficiency. These challenges sit at the intersection of process development and physical design verification.
Why It Matters
For semiconductor fabs and their equipment suppliers, CFET and backside power delivery represent a fundamental departure from conventional planar and FinFET process flows, requiring new deposition, etch, and metrology capabilities on the manufacturing floor. Extraction accuracy directly governs yield prediction and process window qualification — errors at this stage translate to costly re-spins and delayed tape-outs, which compress time-to-revenue for foundry customers. Fabs ramping these processes will need to invest in updated EDA tool qualifications, tighter process control loops, and engineering talent capable of bridging process integration with physical verification. Supply chain implications extend to precursor chemistries, CMP consumables, and advanced metrology hardware needed to characterize the new vertical stacking and buried power rail geometries at volume production tolerances.