document

Thermal characterization of carbon nanotube foam using MEMS microhotplates and thermographic analysis

Silvestri, C. (author), Riccio, M. (author), Poelma, R.H. (author), Morana, B. (author), Vollebregt, S. (author), Santagata, F. (author), Irace, A. (author), Zhang, G.Q. (author), Sarro, P.M. (author)

Thermal material properties play a fundamental role in the thermal management of microelectronic systems. The porous nature of carbon nanotube (CNT) arrays results in a very high surface area to volume ratio, which makes the material attractive for surface driven heat transfer mechanisms. Here, we report on the heat transfer performance of...

journal article 2016

document

Reliability and Lifetime Prediction of Remote Phosphor Plates in Solid-State Lighting Applications Using Accelerated Degradation Testing

Yazdan Mehr, M. (author), Van Driel, W.D. (author), Zhang, G.Q. (author)

A methodology, based on accelerated degradation testing, is developed to predict the lifetime of remote phosphor plates used in solid-state lighting (SSL) applications. Both thermal stress and light intensity are used to accelerate degradation reaction in remote phosphor plates. A reliability model, based on the Eyring relationship, is also...

journal article 2015

document

Highly selective and responsive ultra-violet detection using an improved phototransistor

Soleimanzadeh, R. (author), Kolahdouz, M. (author), Charsooghi, M.A. (author), Kolahdouz Esfahani, Z. (author), Zhang, G.Q. (author)

An ultra-violet (UV) phototransistor with 700x200 lm2 gate area decorated with vertically aligned Zinc Oxide (ZnO) nanorods to enhance UV responsivity is designed and manufactured. Spectral responsivity of the device was measured for wavelengths ranged from 200 to 1100 nm of the electromagnetic spectrum in different transistor working regions....

journal article 2015

document

Tailoring the Mechanical Properties of High-Aspect-Ratio Carbon Nanotube Arrays using Amorphous Silicon Carbide Coatings

Poelma, R.H. (author), Morana, B. (author), Vollebregt, S. (author), Schlangen, H.E.J.G. (author), Van Zeijl, H.W. (author), Fan, X. (author), Zhang, G.Q. (author)

The porous nature of carbon nanotube (CNT) arrays allows for the unique opportunity to tailor their mechanical response by the infiltration and deposition of nanoscale conformal coatings. Here, we fabricate novel photo-lithographically defined CNT pillars that are conformally coated with amorphous silicon carbide (a-SiC) to strengthen the...

journal article 2014

document

Single-Mask Fabrication of Temperature Triggered MEMS Switch for Cooling Control in SSL System

Wei, J. (author), Ye, H. (author), Van Zeijl, H.W. (author), Sarro, P.M. (author), Zhang, G.Q. (author)

A micro-electro-mechanical-system (MEMS) based, temperature triggered, switch is developed as a cost-effective solution for smart cooling control of solid-state-lighting systems. The switch (1.0x0.4 mm2) is embedded in a silicon substrate and fabricated with a single-mask 3D micro-machining process. The device switches on at a designed...

journal article 2012

document

Evaluation and selection of sensing materials for carbon dioxide (CO2) sensor by molecular modeling

Chen, X.P. (author), Wong, C.K.Y. (author), Yuan, C.A. (author), Zhang, G.Q. (author)

We report a molecular modeling study to evaluate and select conducting polymers (CPs) as the sensing materials of carbon dioxide (CO2) sensor. The interaction between polymer and gas and the adsorption of the gas molecules in the polymer matrix are investigated. Polymers considered for this work include emeraldine base polyaniline (EB–PANI) and...

journal article 2011

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Forcefields based molecular modeling on the mechanical and physical properties of emeraldine base polyaniline

Chen, X. (author), Yuan, C.A. (author), Wong, K.Y. (author), Zhang, G.Q. (author)

Molecular dynamics (MD) and molecular mechanical (MM) analysis are carried out to provide reliable and accurate model for emeraldine base polyaniline. This study validate the forcefields and model with the physical and mechanical properties of the polyaniline. The temperature effects on non-bond energy, potential energy and solubility parameter...

journal article 2010

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Challenges in the Assembly and Handling of Thin Film Capped MEMS Devices

Zaal, J.J.M. (author), Van Driel, W.D. (author), Zhang, G.Q. (author)

This paper discusses the assembly challenges considering the design and manufacturability of a Wafer Level Thin Film Package in MEMS applications. The assembly processes are discussed. The loads associated with these processes are illustrated and evaluated. Numerical calculations are combined with experimental observations in order to estimate...

journal article 2010

document

Molecular simulation strategy for mechanical modeling of amorphous/porous low-dielectric constant materials

Yuan, C.A. (author), Van der Sluis, O. (author), Zhang, G.Q. (author), Ernst, L.J. (author), Van Driel, W.D. (author), Flower, A.E. (author), Van Silfhout, B.R. (author)

We propose an amorphous/porous molecular connection network generation algorithm for simulating the material stiffness of a low-k material (SiOC:H). Based on a given concentration of the basic building blocks, this algorithm will generate an approximate and large amorphous network. The molecular topology is obtained by distributing these blocks...

journal article 2008

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Numerical simulation on the mechanical characteristics of double-stranded DNA under axial stretching and lateral unzipping

Yuan, C.A. (author), Zhang, G.Q. (author), Han, C.N. (author), Chiang, K.N. (author), Cui, Y. (author)

The mechanical characteristics of the long-chain double-stranded DNA (dsDNA) molecule under the axial stretching and lateral unzipping are studied by the clustered atomistic-continuum method (CACM). The CACM consisted of the clustered atom method (CAM) and the atomistic-continuum method (ACM). The CAM treats the specific atomic group as the...

journal article 2007

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Mechanical Characterization of III-V Nanowire Using Molecular Dynamics Simulation

Dawotola, A.W. (author), Yuan, C.A. (author), Van Driel, W.D. (author), Bakkers, E.P.A.M. (author), Zhang, G.Q. (author)

conference paper 2007

document

The chemical-mechanical relationship of the SiOC(H) dielectric film

Yuan, C. (author), Van Der Sluis, O. (author), Zhang, G.Q. (author), Ernst, L.J. (author), Van Driel, W.D. (author), Van Silfhout, R.B.R. (author), Thijsse, B.J. (author)

conference paper 2007

document

Multi-scale energy-based failure modeling of bond pad structures

Van Der Sluis, O. (author), Van Silfhout, R.B.R. (author), Engelen, R.A.B. (author), Van Driel, W.D. (author), Zhang, G.Q. (author)

conference paper 2007

document

Thermomechanical Multiscale Modelling of Substrates

Ubachs, R.L.J.M. (author), Van Der Sluis, O. (author), Van Driel, W.D. (author), Zhang, G.Q. (author)

conference paper 2007

document

Combined Virtual Prototyping and Reliability Testing Based Design Rules for Stacked Die System in Packages

Van Driel, W.D. (author), Real, R.A. (author), Yang, D.G. (author), Zhang, G.Q. (author), Pasion, J. (author)

conference paper 2007

document

Thin Film Interface Fracture Properties at Scales Relevant to Microelectronics

Xiao, A. (author), Wang, L.G. (author), Van Driel, W.D. (author), Van Der Sluis, O. (author), Yang, D.G. (author), Ernst, L.J. (author), Zhang, G.Q. (author)

conference paper 2007

document

Micromechanical modeling of stress evolution induced during cure in a particle-filled electronic packaging polymer

Jansen, K.M.B. (author), Wang, L.G. (author), Ernst, L.J. (author), Zhang, G.Q. (author), Bressers, H.J.L. (author)

journal article 2004

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Investigation on flip chip solder joint fatigue with cure-dependent underfill properties

Yang, D.G. (author), Zhang, G.Q. (author), Ernst, L.J. (author), van 't Hof, C. (author), Caers, J.F.J.M. (author), Bressers, H.J.L. (author), Janssen, J.H.J. (author)

journal article 2003

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Stability analysis of anisotropic conical shells

Zhang, G.Q. (author)

doctoral thesis 1993

document

On the orthotropicity assumption and discontinuity conditions of conical shells

Zhang, G.Q. (author), Baruch, M. (author), Arbocz, J. (author)

report 1992