| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jansen, Kaspar
Delft University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (48/48 displayed)
- 2024Design and modelling of a reversible shape memory alloy torsion hinge actuatorcitations
- 2024Mimosa
- 2023Affine Deformation and Self-Assembly Alignment in Hydrogel Nanocomposites
- 2023Shape memory alloy actuators for haptic wearablescitations
- 2022The unfolding of textileness in animated textiles:citations
- 2022Multi-scale experimental testing on variable stiffness and damping components for semi-active structural controlcitations
- 2021Experimental testing on semi-active vibration control through adaptive structural joints
- 2021Multi-scale experimental testing on variable stiffness and damping components for semi-active structural controlcitations
- 20214D printing of reconfigurable metamaterials and devices
- 2020Design and characterization of variable stiffness structural jointscitations
- 2019Characterization of variable stiffness joints for adaptive structurescitations
- 2018Thermal aging modeling of molding compound under high-temperature storage and temperature cycling conditionscitations
- 2017Modelling of Thermal Aging of Moulding Compound by using an Equivalent Layer Assumptioncitations
- 2016Mechanical characterization of a shape morphing smart composite with embedded shape memory alloys in a shape memory polymer matrixcitations
- 2016Water Sorption and Diffusion in (Reduced) Graphene Oxide-Alginate Biopolymer Nanocompositescitations
- 2016Functional Demonstrators to Support Understanding of Smart Materialscitations
- 2016Numerical investigation and experimental validation of residual stresses building up in microelectronics packagingcitations
- 2016Thermo-viscoelastic analysis of GLAREcitations
- 2016Composition dependent properties of graphene (oxide)-alginate biopolymer nanocompositescitations
- 2016Effect of fiber-matrix adhesion on the creep behavior of CF/PPS compositescitations
- 2011Delamination Toughness of Cu-EMC Interfaces at Harsh Environment
- 2011Characterization and modeling the thermo-mechanical cure-dependent properties of epoxy molding compound
- 2011Analytical estimate for cure-induced stresses and warpage in flat packages
- 2010High temperature storage influence on molding compound properties
- 2010Prediction of cure induced warpage of micro-electronic products
- 2010Theory of aluminum metallization corrosion in microelectronics
- 2010Delamination and combined compound cracking of EMC-copper interfaces
- 2010Interfacial fracture parameters of silicon-to-molding compound
- 2010Procedure to determine interfacial toughness of EMC-copper (oxide) interfaces
- 2010Thermal aging of molding compounds
- 2009Modeling and characterization of molding compound properties during cure
- 2009Influence of cure dependency of molding compound properties on warpage and stress distribution during and after the encapsulation of electronics componentscitations
- 2009Investigation on Thermal Properties of Crosslinked Epoxy Resin by MD Simulation
- 2009Cure induced Warpage of micro-electronics: comparison with experiments
- 2009Moisture absorption and hygroscopic swelling characterization of molding compound
- 2009Comprehensive material characterization of organic packaging materialscitations
- 2009Effect of Postcure and Thermal Aging on Molding Compound Properties
- 2008Effect of aging of packaging materials on die surface cracking of a SiP carrier
- 2008Interfacial Fracture Properties and Failure Modeling for Microelectronicscitations
- 2008A Characterization Method for Viscoelastic Bulk Modulus of Molding Compounds
- 2008Advanced Viscoelastic Material Model for Predicting Warpage of a QFN Panel
- 2008Characterization and modeling of molding compound properties during cure
- 2007Correlation between chemistry of polymer building blocks and microelectronics reliability
- 2007Effect of filler concentration of rubbery shear and bulk modulus of molding compounds
- 2007Measuring the through-plane elastic modulus of thin polymer films in situ
- 2007Micro-mechanical testing of SiLK by nanoindentation and substrate curvature techniques
- 2007Characterization of moisture properties of polymers for IC packaging
- 2005State-of-the-Art of Thermo-Mechanical Characterization of Thin Polymer Films
Places of action
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document
Advanced Viscoelastic Material Model for Predicting Warpage of a QFN Panel
Abstract
Warpage is a critical issue for a QFN panel molding process. Much work was done in the past to predict the warpage of a package during cooling down from molding temperature. However, until now, warpage could not always be predicted well, even if the viscoelastic behavior of the molding compound is taken into account. It was for example observed that the cooling velocity affected the warpage after cooling down. Because of this reason, the mechanical behavior of the molding compound was investigated in more detail. In this research, the mechanical properties of the molding compound are determined. It turned out that the properties are highly dependent on time and temperature. A complete viscoelastic model of the model compound is achieved by combining DMA and dilatometric test results. The model is implemented in the finite element software ABAQUS. In this study, our advanced model is compared with elastic calculations which are normally done. A validation experiment is performed in which simulation results are compared with experimental warpage data of a double layered beam, consisting of a layer of molding compound and a layer of silicon. This beam is cooled down from a temperature above Tg to room temperature with different cooling rates. In the meantime warpage is measured and compared to simulation results. Finally, the advanced material model is used for calculations on a QFN-panel.