Isotropic conductive adhesive filled with metal-coated polymer spheres &amp;#x2014; Effects of metal coating on rheological and mechanical properties

Nguyen, Hoang-Vu; Kristiansen, Helge; Johannessen, Rolf; Andreassen, Erik; Høivik, Nils; Aasmundtveit, Knut E.

doi:10.1109/estc.2012.6542147

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…A high particle volume fraction, i.e., a low volume fraction of the adhesive matrix, may result in an MPS-based ICA with low mechanical strength. However, in [11] and [12], we found that an epoxybased adhesive filled with uncoated polymer spheres exhibits high die shear strength, being comparable with traditional solders, even with particle loadings as high as 50 vol%. The polymer sphere size (Ø6 versus Ø30 μm) has no significant effect on the die shear strength.…”

Section: Introductionmentioning

confidence: 78%

“…The constituents of the ICA samples are shown in Table II. A particle loading of 45 vol% was selected for ICA-1, based on previous researches showing that an ICA with this loading exhibits good electrical conductivity [9] and high die shear strength [11], [12]. For ICA-2, the adhesive matrix was loaded with 25 vol% of Ag flakes (73 wt%), which is within the typical range for conventional ICAs [1].…”

Section: B Preparation Of Ica Pastesmentioning

confidence: 99%

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Die Shear Testing of a Novel Isotropic Conductive Adhesive—Epoxy Filled With Metal-Coated Polymer Spheres

Nguyen

Andreassen

Kristiansen

et al. 2013

IEEE Trans. Compon., Packag. Manufact. Technol.

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Isotropic conductive adhesives (ICAs) filled with metal-coated polymer spheres (MPS) are introduced to improve the mechanical reliability compared with conventional ICAs filled with silver (Ag) flakes. This paper deals with the die shear performance of an MPS-based ICA; an epoxy filled with 45 vol% of Ø 30 µm Ag-coated monodisperse polymer spheres. The curing kinetics of the ICA is also studied. The MPS-based ICA is compared with two ICAs filled with Ag flakes: an in-house prepared ICA (with the same epoxy matrix as the MPS-based ICA) and a commercially available ICA. Both ICAs with Ag flakes have a lower particle volume fraction than the MPS-based ICA. Loading 45 vol% of MPS into the epoxy matrix has no significant effect on the curing kinetics and the glass transition temperature (T g ) of the matrix. The MPS-based ICA has 140% higher die shear strength than the in-house prepared ICA with Ag flakes, and 23% higher die shear strength than the commercial ICA with Ag flakes. The MPS-based ICA also has higher shear strain at failure, and less scatter in shear strength between repeated tests. Hence, the MPS-based ICA has a good potential for demanding applications; it has better die shear performance and higher T g than the commercial ICA with Ag flakes.Index Terms-Isotropic conductive adhesive (ICA), metalcoated polymer spheres (MPS), shear test, stiffness.

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Section: Introductionmentioning

confidence: 78%

Section: B Preparation Of Ica Pastesmentioning

confidence: 99%

Die Shear Testing of a Novel Isotropic Conductive Adhesive—Epoxy Filled With Metal-Coated Polymer Spheres

Nguyen

Andreassen

Kristiansen

et al. 2013

IEEE Trans. Compon., Packag. Manufact. Technol.

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Modeling of bonding piezoelectric stack using conductive adhesive with metal-coated polymer fillers

Kang

Feng

et al. 2023

Mechanical Systems and Signal Processing

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An Overview of Isotropic Conductive Adhesives Filled with Metal-coated Polymer Spheres

Nguyen

Aasmundtveit

Kristiansen

et al. 2013

International Symposium on Microelectronics

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Novel isotropic conductive adhesives (ICAs) filled with metal-coated polymer spheres (MPS) have been introduced in order to improve the mechanical performance, and hence the reliability, compared to conventional ICAs filled with solid silver (Ag) particles. This paper summarizes a number of characterization studies on the electrical, the mechanical and the rheological properties, as well as a study on the reliability, of MPS-based ICAs. The feasibility of the ICAs filled with MPS has been demonstrated in terms of potential processing capabilities, improved mechanical performance and competitive electrical properties (compared to conventional ICAs with Ag flakes). Therefore, the MPS-based ICAs have a good potential for demanding environment applications, in which electronic products (e.g., hand held devices) are subjected to thermal shock and thermal cycling, mechanical vibration and mechanical shock.

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Isotropic conductive adhesive filled with metal-coated polymer spheres — Effects of metal coating on rheological and mechanical properties

Cited by 3 publications

References 12 publications

Die Shear Testing of a Novel Isotropic Conductive Adhesive—Epoxy Filled With Metal-Coated Polymer Spheres

Die Shear Testing of a Novel Isotropic Conductive Adhesive—Epoxy Filled With Metal-Coated Polymer Spheres

Modeling of bonding piezoelectric stack using conductive adhesive with metal-coated polymer fillers

An Overview of Isotropic Conductive Adhesives Filled with Metal-coated Polymer Spheres

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