Browsing School of Microelectronic Engineering (Articles) by Issue Date
Now showing items 21-40 of 185
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Under Bump Metallurgy (UBM)-a technology review for flip chip packaging
(Department of Mechanical Engineering, University Malaya, 2007)Flip chip packaging technology has been utilized more than 40 years ago and it still experiencing an explosives growth. This growth is driven by the need for high performance, high volume, better reliability, smaller size ... -
The characterization of Al Bond pad surface treatment in Electroless Nickel Immersion Gold (ENIG) deposition
(Science Publications, 2007)This study reports a number of experiments that were designed to characterize aluminum bond pad surfaces prior to electroless nickel immersion gold (ENIG). In the ENIG process, aluminum bond pads need special treatment ... -
Effect of alignment mark architecture on alignment signal behavior in advanced lithography
(Universiti Malaya, 2007)Alignment mark architecture is divided into two types, which depending on where the mark is defined. Alignment mark that is defined through the contact masking steps is known as contact mark and alignment mark that is ... -
Designing of masks for quantum dot single electron transistor fabrication using E-beam nanolithography
(Nano Science and Technology Institute, 2007)Quantum dot single electron transistor (QD SET) is able to be fabricated through a joint technique of e-beam lithography (EBL), pattern dependent oxidation (PADOX) and high density plasma etching. In this research, we have ... -
Borophosphosilicate glass (BPSG) reflow characterization for submicron CMOS technology
(Universiti Kebangsaan Malaysia, 2007)This paper involves the planarization of borophosphosilicate glass (BPSG) film using a new recipe for annealing process to improve the borophosphosilicate glass (BPSG) film flatness after reflow. This improvement is for ... -
Monitoring System for uninterruptible power supply
(Science Publications, 2007)In industrial process today, reliability of equipment is very important. Power supply must be able to cater the need of industrial process. In case of power failure, backup power supply system must be able to support the ... -
A simple oxidation technique for quantum dot dimension shrinkage and tunnel barriers generation
(Elsevier B.V., 2007-05)The tunnel barriers generation and the quantum dot size shrinkage play a significant role in single-electron transistor (SET) fabrication. Because the numerically etch indicators were not found, the technical indicators, ... -
The surface morphology characterization of electroless nickel immersion gold under bump metallurgy (UBM) using SEM
(American Institute of Physics, 2007-05-09)This paper presents the surface morphology characterization at each process step in electroless nickel immersion gold (ENIG) deposition using Scanning Electron Microscope (SEM). The characterization start at initial bond ... -
An estimation of the energy and exergy efficiencies for the energy resources consumption in the transportation sector in Malaysia
(Elsevier Ltd., 2007-08)The purpose of this work is to apply the useful energy and exergy analysis models for different modes of transport in Malaysia and to compare the result with a few countries. In this paper, energy and exergy efficiencies ... -
Nano patterning of cone dots and nano constrictions of negative e-beam resist for single electron transistor fabrication
(Springer New York, 2007-12)We present an optimization of nano dot of negative tone e-beam resist which is a very important step in single electron transistor fabrication process. The optimum design of dot and nano constriction plays a significant ... -
A voltage reference circuit for current source of RFIC blocks
(Emerald Group Publishing Limited, 2008)Purpose - The purpose of this paper is to design a voltage reference circuit for current source of radio frequency integrated circuit blocks. The voltage reference circuit is called voltage for current source (VCS). ... -
Characterization of intermetallic growth of gold ball bonds on aluminum bond pads
(University of Malaya, 2008)In this paper the intermetallic growth between gold ball bond and aluminum bond pad are studied. It involves thermal aging at 150 °C and 200 °C for various time intervals. The relationship between electrical resistance and ... -
High-sensitivity pressure sensor using a polymer-embedded FBG
(Wiley Periodicals, Inc., 2008-01)A new pressure sensor based on fiber Bragg gratings (FBG), is described with high-pressure sensitivity. The sensor is configured by embedding the FBG in a polymer-field aluminum casing with an opening on one side, which ... -
Fabrication and characterization of Si quantum dots and SiO2 tunnel barriers grown by a controlled oxidation process
(IOP Publishing Ltd, 2008-01-29)The control of the growth of silicon dioxide (SiO2) and the formation of quantum dots (QDs) play an important role in the fabrication of single-electron transistors (SETs). In this work, SET structures were fabricated using ... -
Core nucleus polarization in Λ hypernuclei
(The American Physical Society, 2008-03)The response of the core nucleus to the Λ in a hypernucleus is studied with a local density approximation. This reproduces the energies and radii of the core nuclei as well as the Λ-single particle (s.p.) energies quite ... -
Optical investigations using ultra-soft pseudopotential calculations of Si0.5Ge0.5 alloy
(Elsevier Ltd, 2008-12)Ultra-soft pseudopotential (US-PP) calculations with a powerful package called VASP (Vienna ab initio simulation package) are used. The total density of state and the energy gap of Si0.5Ge0.5 alloy of zinc-blende structure ... -
Electronic properties of orthorhombic LiGaS2 and LiGaSe 2
(Springer Berlin/Heidelberg, 2009)We report theoretical calculations of the band structure and density of states for orthorhombic LiGaS2 (LGS) and LiGaSe2 (LGSe). These calculations are based on the full potential linear augmented plane wave (FP-LAPW) ... -
Nano-silver microcavity enhanced UV GaN light emitter
(Inderscience Enterprises Limited, 2009)We report results of measurements that help to clarify the role of silver in the reflection of UV emission light from GaN. A GaN as an active layer was sandwiched between two silver metal reflectors. GaN layer on sapphire ... -
Facial features for template matching based face recognition
(Science Publications, 2009)Problem statement: Template matching had been a conventional method for object detection especially facial features detection at the early stage of face recognition research. The appearance of moustache and beard had ...