Pad-Based CDM ESD Protection Methods Are Faulty
Pad-Based CDM ESD Protection Methods Are Faulty
复制标题
基于焊盘的 CDM ESD 保护方法存在缺陷
DOI:
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发表时间:
2020
影响因子:
2.3
通讯作者:
Albert Z. H. Wang
中科院分区:
文献类型:
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作者:
Mengfu Di;Cheng Li;Zijin Pan;Albert Z. H. Wang
Charged device model (CDM) electrostatic discharge (ESD) protection remains a huge challenge for integrated circuit (IC) reliability designs. The “internal-oriented” CDM model and the “external-oriented” human body model (HBM) describe fundamentally different ESD phenomena. Through the comprehensive analysis, this article concludes that the classic pad-based ESD protection methods, commonly used for “from-external-to-internal” HBM ESD protection, are theoretically not working for “from-internal-to-external” CDM ESD protection. It states that the actual internal distribution of static charges within a chip is vitally critical to CDM ESD protection. The discovery explains the potential root cause of the randomness and uncertainty of pad-based CDM ESD protection designs commonly observed today, hence calls for new CDM ESD protection solutions.