Quantitative Analysis of Porosity and Transport Properties by FIB-SEM 3D Imaging of a Solder Based Sintered Silver for a New Microelectronic Component

Rmili, Wafaa; Vivet, N.; Chupin, Sylvain; Bihan, T. Le; Quilliec, Guénhaël Le; Richard, Caroline

doi:10.1007/s11664-015-4288-1

Cited by 24 publications

(8 citation statements)

References 43 publications

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“…This elucidates the intrinsic difference of the sintering mechanism between these two types of silver pastes. Apparently, the microstructure of sintered AgMP was not as uniform as that of sintered AgNP, which leads to the distinguishing mechanical, electrical and thermal properties [19] .…”

Section: Sintered Morphologymentioning

confidence: 98%

Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation

Long

Feng

et al. 2019

International Journal of Mechanical Sciences

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During the sintering process, a three-dimensional network-like porous structure forms as the consequences of atom diffusion and neck formation among silver particles. In this paper, two representative types of pressureless sintered silver particles, i.e. , silver nanoparticles (AgNP) and silver microparticles (AgMP), are investigated to reveal the intrinsic correlation between microstructure and constitutive behaviour. The heterogeneous microstructure is found to result in distinguishing differences in terms of morphology and thermal stability. The difference of sintering mechanisms between these two types of silver pastes are observed by a scanning electron microscope and discussed. Regarding thermal stability, the effect of particle size and shape on the sintering temperature and mass loss are evaluated using the thermogravimetric analysis and the differential scanning calorimetry. The microstructural effect on the mechanical behaviour of both sintered AgNP and AgMP samples is measured by performing nanoindentations with a Berkovich indenter penetrated up to 2000 nm with different indentation strain rates. During indentation, Young's modulus and hardness are measured as the functions of penetration depth. By solving dimensionless equations, the parameters of a power-law constitutive model are obtained analytically based on the integrated work done in the loading stage and the contact stiffness in the unloading stage in the nanoindentation experiments. The correlation between microstructure and constitutive behaviour is elucidated by the comparison of sintered AgNP and AgMP but further investigations related to the size and shape effects of particles are expected.

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Section: Sintered Morphologymentioning

confidence: 98%

Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation

Long

Feng

et al. 2019

International Journal of Mechanical Sciences

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“…One example of such grains is inserted in top left corner of Figure 2 (h); note that this image was specifically selected to capture one of these rare grains (observed 1 in 7000 grains), while all other images in Figure 2 are from random areas. These growing grains could correspond to the small number of closed spaces expected inside sintered silver, while 96-99.9% of the pores will be part of an open network [15,16]. Inside the closed spaces steam cannot penetrate and therefore grain growth can occur.…”

Section: Resultsmentioning

confidence: 99%

Ultra-Stable Sintered Silver Die Attach for Demanding High-Power/Temperature Applications

Paknejad

Khtatba

Mansourian

et al. 2017

IEEE Trans. Device Mater. Relib.

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Abstract:A novel and simple processing step has been demonstrated to produce thermally stable sintered silver nanoparticles structures. Sintered silver has been investigated as a die attach to resolve the long-standing demand for a reliable material to enable high power/temperature electronics operating above 300 °C. However, it is now a well-known fact that such materials undergo massive microstructural evolution at 250 °C and above, creating doubts about their longterm reliability. Here an additional processing step utilizing oxidizing treatment is demonstrated to immobilize the silver atoms through formation of Ag2O. This technique stabilizes sintered silver up to 400 °C, taking advantage of the open pore network to facilitate treatment deep in the material interior.

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“…Segmentation methods are being adapted to combat these issues, for example the morphological segmentation method and automatic phase segmentation method presented in [45][46][47][48]89]. 3D information on pore interconnectivities has provided modellers with first-hand information about complex materials that allows them to simulate transport properties [43,74,76,90,91], thereby gaining further knowledge of how the pore shape and interactions influence fluid flow, particularly permeability and fluid velocity. Future studies need to evaluate the impact of different segmentation strategies on numerical transport modelling and test the modelling results against experimental investigations.…”

Section: Discussionmentioning

confidence: 99%

Nano-Tomography of Porous Geological Materials Using Focused Ion Beam-Scanning Electron Microscopy

Liu

Huis

et al. 2016

Minerals

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Tomographic analysis using focused ion beam-scanning electron microscopy (FIB-SEM) provides three-dimensional information about solid materials with a resolution of a few nanometres and thus bridges the gap between X-ray and transmission electron microscopic tomography techniques. This contribution serves as an introduction and overview of FIB-SEM tomography applied to porous materials. Using two different porous Earth materials, a diatomite specimen, and an experimentally produced amorphous silica layer on olivine, we discuss the experimental setup of FIB-SEM tomography. We then focus on image processing procedures, including image alignment, correction, and segmentation to finally result in a three-dimensional, quantified pore network representation of the two example materials. To each image processing step we consider potential issues, such as imaging the back of pore walls, and the generation of image artefacts through the application of processing algorithms. We conclude that there is no single image processing recipe; processing steps need to be decided on a case-by-case study.

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Quantitative Analysis of Porosity and Transport Properties by FIB-SEM 3D Imaging of a Solder Based Sintered Silver for a New Microelectronic Component

Cited by 24 publications

References 43 publications

Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation

Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation

Ultra-Stable Sintered Silver Die Attach for Demanding High-Power/Temperature Applications

Nano-Tomography of Porous Geological Materials Using Focused Ion Beam-Scanning Electron Microscopy

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