IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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An enhanced time-to-digital conversion solution for pre-bond TSV dual faults testing
Ni TianmingChang HaoSun XianXia XiuzhenHuang Zhengfeng
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Keywords: 3D ICs, TSV, pre-bond test
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2019 Volume 16 Issue 3 Pages 20181105

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Abstract

Pre-bond TSV test plays a vital role in improving the yield and reducing the cost of 3D ICs. In this paper, a non-invasive solution for pre-bond TSV test based on pulse shrinking is proposed. This method makes use of the fact that defects in TSV lead to variation in the propagation delay - the rise and fall times are first transformed into pulse width, and the pulse shrinking technique is used to digitize the pulse width into a digital code which is then compared with an expected value for a fault-free TSV. Experiments on TSV defect detection are carried out using HSPICE simulations with realistic models for 45 nm CMOS technology. Experimental results show that the proposed method can detect not only open (leakage) fault but also dual faults with high resolution.

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© 2019 by The Institute of Electronics, Information and Communication Engineers
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