Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Characterization of Micro-Crack Propagation through Analysis of Edge Effect in Acoustic Micro Imaging of Microelectronic Packages

Zhang, G and Lee, C and Harvey, D and Qi, A (2016) Characterization of Micro-Crack Propagation through Analysis of Edge Effect in Acoustic Micro Imaging of Microelectronic Packages. NDT & E International, 79. pp. 1-6. ISSN 1879-1174

[img] Text
Characterization of micro crack propagation_R1[1].pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (989kB)

Abstract

The miniaturization and three dimensional die stacking in advanced microelectronic packages poses a big challenge to their non-destructive evaluation by acoustic micro imaging. In particular, their complicated structures and multiple interfaces make the interpretation of acoustic data even more difficult. A common phenomenon observed in acoustic micro imaging of microelectronic packages is the edge effect phenomena, which obscures the detection of defects such as cracks and voids. In this paper, two dimensional finite element modelling is firstly carried out to numerically simulate acoustic micro imaging of modern microelectronic packages. A flip-chip with a 140µm solder bump and a 230MHz virtual transducer with a spot size of 16µm are modelled. Crack propagation in the solder bump is further modelled, and B-scan images for different sizes of micro-cracks are obtained. C-line plots are then derived from the simulated B-scan images to quantitatively analyze the edge effect. Gradual progression of the crack is found to have a predictable influence on the edge effect profile. By exploiting this feature, a crack propagation characterization method is developed. Finally, an experiment based on the accelerated thermal cycling test is designed to verify the proposed method.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: General Engineering Research Institute
Publisher: Elsevier
Date Deposited: 09 Dec 2015 10:53
Last Modified: 03 Dec 2016 00:50
DOI or Identification number: 10.1016/j.ndteint.2015.11.007
URI: http://researchonline.ljmu.ac.uk/id/eprint/2445

Actions (login required)

View Item View Item