Comprehensive lifetime prediction for intrinsic and extrinsic TDDB failures in Cu/Low-k interconnects

• Published in: 2011 IEEE International Interconnect Technology Conference pp. 1 - 3
• Main Authors: Suzumura, N., Ogasawara, M., Makabe, K., Kamoshima, T., Ouchi, T., Yamamoto, S., Furusawa, T., Murakami, E.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.05.2011
• Subjects: Copper; Electric breakdown; Electric fields; Layout; Optical fibers; Periodic structures; Predictive models
• ISBN: 9781457705038; 1457705036
• ISSN: 2380-632X; 2380-6338
• DOI: 10.1109/IITC.2011.5940292

We present a comprehensive lifetime prediction methodology for both intrinsic and extrinsic Time-Dependent Dielectric Breakdown (TDDB) failures to provide adequate Design-for-Reliability. For intrinsic failures, we propose applying the √E model and estimating the Weibull slope using dedicated single-via test structures. This effectively prevents lifetime underestimation, and thus relaxes design restrictions. For extrinsic failures, we propose applying the thinning model and Critical Area Analysis (CAA). In the thinning model, random defects reduce effective spaces between interconnects, causing TDDB failures. We can quantify the failure probabilities by using CAA for any design layouts of various LSI products.