Abang Annuar Ehsan

Abang Annuar Ehsan

Universiti Kebangsaan Malaysia

H-index: 13

Asia-Malaysia

About Abang Annuar Ehsan

Abang Annuar Ehsan, With an exceptional h-index of 13 and a recent h-index of 6 (since 2020), a distinguished researcher at Universiti Kebangsaan Malaysia, specializes in the field of Photonics, Optical Design, Manufacturing.

His recent articles reflect a diverse array of research interests and contributions to the field:

Customizing ultraviolet curable polymer‐ink properties via reactive diluent modification and viscosity control

Indoor Environmental Quality in Micro & Nanoelectronics Laboratories at IMEN, Research Complex, UKM

Air-Processable Perovskite Solar Cells by Hexamine Molecule Phase Stabilization

Optoelectrical properties of hexamine doped-methylammonium lead iodide perovskite under different grain-shape crystallinity

Design structure of ZnO coated on hetero-core fiber optic

Intensity Loss of ZnO Coated on Fiber Optic

Cardinal and ordinal directions approach in investigating arrayed solder joints crack propagation of ball grid array semiconductor packages

Thermal-Induced Damage on Solder Joints of High-Density Adjacent Ball Grid Array Components During the Rework Process

Abang Annuar Ehsan Information

University

Universiti Kebangsaan Malaysia

Position

Research Fellow Institute of Microengineering and Nanoelectronics (IMEN)

Citations(all)

676

Citations(since 2020)

201

Cited By

865

hIndex(all)

13

hIndex(since 2020)

6

i10Index(all)

20

i10Index(since 2020)

3

Email

University Profile Page

Universiti Kebangsaan Malaysia

Abang Annuar Ehsan Skills & Research Interests

Photonics

Optical Design

Manufacturing

Top articles of Abang Annuar Ehsan

Customizing ultraviolet curable polymer‐ink properties via reactive diluent modification and viscosity control

Authors

Firdaus Jamal Rashid,Norsyazfirah Mohamed,Rusli Daik,Abang Annuar Ehsan

Journal

Journal of Applied Polymer Science

Published Date

2024/1/15

In inkjet 3D printing, material selection plays a crucial role in shaping both printing performance and material characteristics. Achieving the desired properties relies on precisely formulated compositions. In this context, ultraviolet (UV) curable polymers require specific viscosities, typically ranging from 3700 to 5700 mPa·s, to function effectively in 3D printing's material jetting technique, preventing complications during material dispensing. This study formulates UV‐curable polymers by blending four distinct monomers: Genomer 4247 Aliphatic Urethane Dimethacrylate, 1,10‐Decanediol Dimethacrylate, Isobornyl Acrylate, and Methyl Acrylate, within a controlled dark room environment at room temperature to prevent undesired crosslinking reactions during mixing. The selection of these monomers and their compositions is meticulous, considering their capacity to achieve specified viscosities and enhance overall …

Indoor Environmental Quality in Micro & Nanoelectronics Laboratories at IMEN, Research Complex, UKM

Authors

Mohd Hannas Hosnon,Noor Anilizawatima Sulong,Abang Annuar Ehsan,Khairul Nisha Mohd Kharuddin

Journal

Journal of Advanced Research in Applied Sciences and Engineering Technology

Published Date

2023/10/14

The National University of Malaysia's Micro and Nanoelectronics laboratories were examined to ascertain their comfort levels. Eight laboratories were chosen as the study locations. This study aims to assess the interior air quality at six locations by measuring CO 2, formaldehyde CHOH, total volatile organic compound TVOC, PM2. 5, indoor temperature, and relative humidity. The thermal comfort evaluation for labs 1, 2, 3, 4, 5, and 7 is between 20.45 and 22.47 C, which is below the range of DOSH and Ashrae. While the average readings in laboratories 6 and 8 are within the limits allowed at 23, 21 C and 23, 75 C, respectively. Five laboratories were exceeding the upper limit of RH (30–60%) but only three laboratories were still within the maximum level mentioned by the Ashrae standard. RH exceeded the ICOP limit (60%) at 70.3%, 63.7%, 75.4%, 60.6%, 62.8% and 65.5%, at Lab 1, 2, 3, 6, 7 and 8, respectively, whereas temperature exceeded it (22.5-26 C) at 20.45, 22.2, 21.9, 22.43, 21.58 and 22.47 at Lab 1, 2, 3, 4, 5, 7 and 8, respectively. While the average air velocities for all laboratories are 0.17, 0.13, 0.10, 0.16, 0.12, 0.14, 0.15 and 0.09 ms-1, respectively. All the data that has been measured is found to be below the maximum level as recommended by the ASHRAE Standard 55 (2004) of 0.25 ms-1. The indoor air contaminants (CO, CHOH, TVOC, PM2. 5, and PM10) met the standard level of ICOP and DOSH except for CHOH approaches ICOP (0.1 ppm) at 0.1 and 0.09, at Point 9 and Point 10 for laboratory 3 compared to other laboratories where the concentration obtained is lower. The highest laboratories average concentration of PM2 …

Air-Processable Perovskite Solar Cells by Hexamine Molecule Phase Stabilization

Authors

Nabilah Alias,Akrajas Ali Umar,Siti Naqiyah Sadikin,Jaenudin Ridwan,Azrul Azlan Hamzah,Marjoni Imamora Ali Umar,Abang Annuar Ehsan,Muhammad Nurdin,Yiqiang Zhan

Journal

ACS omega

Published Date

2023/5/18

Perovskite solar cells have emerged as a potential energy alternative due to their low cost of fabrication and high power conversion efficiency. Unfortunately, their poor ambient stability has critically limited their industrialization and application in real environmental conditions. Here, we show that by introducing hexamine molecules into the perovskite lattice, we can enhance the photoactive phase stability, enabling high-performance and air-processable perovskite solar cells. The unencapsulated and freshly prepared perovskite solar cells produce a power conversion efficiency of 16.83% under a 100 mW cm–2 1.5G solar light simulator and demonstrate high stability properties when being stored for more than 1500 h in humid air with relative humidity ranging from 65 to 90%. We envisage that our findings may revolutionize perovskite solar cell research, pushing the performance and stability to the limit and bringing …

Optoelectrical properties of hexamine doped-methylammonium lead iodide perovskite under different grain-shape crystallinity

Authors

Marjoni Imamora Ali Umar,Annisa Zahra Ahdaliza,Salah M El-Bahy,Nur Aliza,Siti Naqiyah Sadikin,Jaenudin Ridwan,Abang Annuar Ehsan,Mohammed A Amin,Zeinhom M El-Bahy,Akrajas Ali Umar

Journal

Nanomaterials

Published Date

2023/4/5

The crystallinity properties of perovskite influence their optoelectrical performance in solar cell applications. We optimized the grain shape and crystallinity of perovskite film by annealing treatment from 130 to 170 °C under high humidity (relative humidity of 70%). We found that the grain size, grain interface, and grain morphology of the perovskite are optimized when the sample was annealed at 150 °C for 1 h in the air. At this condition, the perovskite film is composed of 250 nm crystalline shape grain and compact inter-grain structure with an invincible grain interface. Perovskite solar cells device analysis indicated that the device fabricated using the samples annealed at 150 °C produced the highest power conversion efficiency, namely 17.77%. The open circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) of the device are as high as 1.05 V, 22.27 mA/cm2, and 0.76, respectively. Optoelectrical dynamic analysis using transient photoluminescence and electrochemical impedance spectroscopies reveals that (i) carrier lifetime in the champion device can be up to 25 ns, which is almost double the carrier lifetime of the sample annealed at 130 °C. (ii) The interfacial charge transfer resistance is low in the champion device, i.e., ~20 Ω, which has a crystalline grain morphology, enabling active photocurrent extraction. Perovskite’s behavior under annealing treatment in high humidity conditions can be a guide for the industrialization of perovskite solar cells.

Design structure of ZnO coated on hetero-core fiber optic

Authors

NAA Arif,DD Berhanuddin,AA Ehsan

Journal

AIP Conference Proceedings

Published Date

2023/3/23

Semiconductor optical fiber is currently in high demand because of its significant potential in sensors. ZnO is a good material that can support and enhance the performance of fiber optics. The addition of ZnO film on the hetero-core fiber optics with good core size and refractive index can deliver a special outcome based on the power intensity. In this study, comparison between fiber structure is analysed in term of wavelenght and ZnO film coated on hetero-core portion of fiber optics. The optical propagation losses of such structures are simulated using the COMSOL Multiphysics for different wavelengths (1310 and 1550 nm), refractive index, fiber structure (9–50–9 and 50–9–50 μm) and ZnO thicNness (10–50 μm). The results show that 1310 nm of wavelength affected the sensitivity of the design structure. Moreover, the transmittance at the output terminal increased as the ZnO thicNness increased using 50–9–50 μm …

Intensity Loss of ZnO Coated on Fiber Optic

Authors

Noor Azie Azura Mohd Arif,Sahbudin Shaari,Abang Annuar Ehsan

Journal

Journal of Nanomaterials

Published Date

2023/2/13

Macrobends are optical fiber structures suitable for detecting motion changes. This structure has been developed using single-mode fibers and a combination of single-mode and multimode fibers called hetero-core. In this study, a new macrobending structure was designed and developed by adding a nano-ZnO element to the fiber optic core based on Revolution 4.0. The addition of nanomaterial elements involves an etching process that uses harmful chemicals or high-cost laser technology. Therefore, hetero-core was applied in this study to replace the etching process. The ZnO-coated fiber optics with 10 (ZnO1), 20 (ZnO2), and 30 (ZnO3) times of dip coating were developed using the dip-coating method and characterized using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy. Sensitivity measurement was conducted with glued optical fiber in the form of bending using a tape with a bending dimension of 2.5 cm × 1.5 cm and a wavelength of 1,550 nm. Morphological characterization using SEM proves that nanoparticles are attached to the optical fiber, and the EDX characterization confirms that the nanoparticles are ZnO elements. Optical fiber sensor sensitivity using core sizes 9, 50–9–50, 50–9–50 (ZnO1), 50–9–50 (ZnO2), and 50–9–50 (ZnO3) achieved sensitivity values of 0.91, 1.61, 2.98, 3.34, and 3.51, respectively. This study successfully produced ZnO-coated optical fiber sensors with a hetero-core structure without performing the etching process and successfully increased the sensitivity of the sensors.

Cardinal and ordinal directions approach in investigating arrayed solder joints crack propagation of ball grid array semiconductor packages

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Azman Jalar,Erwan Basiron,Fakhrozi Che Ani

Journal

IEEE Transactions on Components, Packaging and Manufacturing Technology

Published Date

2022/8/11

An accelerated reliability testing via thermal cycling test (TCT) was used to test ball grid array (BGA) components’ reliability. Five variables were observed; control sample J and samples K, L, M, and N were BGA component samples that have been exposed to TCT between 500 and 1250 cycles with the TCT profile in the range of 0 °C–100 °C. The crack orientation of the individual solder joint was analyzed along with the propagation path pattern on the solder array of the BGA component pad by analyzing the dye and pull test results that were then mapped and analyzed using the cardinal and ordinal directions approach. This is to determine the crack propagation path direction in the solder array and track the potential of warpage on the BGA package as the TCT cycles progressed. A cross section was performed on sample M with the 3-D X-ray and scanning electron microscopy (SEM) analysis to observe the solder …

Thermal-Induced Damage on Solder Joints of High-Density Adjacent Ball Grid Array Components During the Rework Process

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Zol Effendi Zolkefli

Journal

Jurnal Teknologi

Published Date

2022/10/31

Correlation between adjacent ball grid array (BGA) components' temperature and thermal-induced damage to their solder joints on both the top and bottom printed circuit board assembly (PCBA) sides during the rework process is studied in this work. Total often adjacent BGA components from the rework area on the top (F - K) and bottom (A - E) PCBA side were observed. The dye and pull (D&P) test results, infrared thermography images, and temperature measurements were analyzed for solder joint crack induced by the thermal damage with precise temperature measurement on each adjacent BGA component. Scanning electron microscope (SEM) analysis complemented the post-D&P test solder joint crack observation. The D&P test results shows that 76 % or higher and solder joint separation locations at the copper pad on BGA occurred when the temperature of the adjacent components of the rework location exceeded 195 °C and 210 °C on the centre and corner of the component, respectively.

EFFECTS OF HYDROPHOBIC COATING, DISPENSING TIME, AND APPLIED PRESSURE ON UV POLYMER DROPLET FORMATION BY AIR PRESSURE INJECTION METHOD

Authors

FIRDAUS JAMAL RASHID,RUSLI DAIK,ABANG ANNUAR EHSAN

Journal

Journal of Engineering Science and Technology

Published Date

2022/6

Inkjet 3D printing system is one of the methods available for 3D-printed objects production. In comparison to the SLA 3D printing system, this method utilises a lower amount of polymeric material for printing. Moreover, most conventional inkjet 3D printing systems utilise a piezoelectric dispensing unit which can be costly. In this study, a droplet formation system using a simple air pressure principle is proposed with the aim of investigating the effects of hydrophobic coating, applied pressure, and dispensing time on the formation of droplets on the printing platform. From the study, it was observed that the platform with hydrophobic coating yielded significantly smaller sized droplets compared to that of non-hydrophobic coating. In addition, lower magnitudes applied pressure and dispensing time had also resulted in smaller sized droplets formation. These variables are critical since a low value could affect the ejection of UV polymer. The smallest size of droplet formed in the proposed system was 3.312 mm, achieved at 0.5 second dispensing time and 0.15 MPa pressure applied on hydrophobic coating plate. The application of hydrophobic coating in addition to the adjustment of significant parameters in an inkjet 3D printing system could therefore improve the formation of UV polymer droplets.

Effects of Underfill Materials on Behavior of Intermetallic Compound Thickness of Ball Grid Array Solder Joints Using ANOVA

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Azman Jalar,Fakhrozi Che Ani,Zol Effendi Zolkefli

Published Date

2022/10/19

Underfill material has normally been used to improve the ball grid array (BGA) component's reliability and performance by allowing ruggedness and portability. However, the excessive thickness of the intermetallic compound (IMC) layer development on BGA balls can decrease the reliability of the solder joints. This paper investigated the IMC layer growth variances on BGA component solder joints with and without underfill post thermal cycle test using ANOVA. Four variables were observed; sample a: BGA ball without underfill, sample b: BGA ball with underfill, sample c: post rework BGA ball without underfill, and sample d: post rework BGA ball with underfill. The investigation revealed the comparison of the IMC layer growth variances between the samples using ANOVA can determine the differences between the means and estimate whether the variance was practically significant. Each confidence interval has a …

Development of Polymer-Based Y-Branch Symmetric Waveguide Coupler Using Soft Lithography Technique

Authors

MSM Ghazali,FRM Romlay,AA Ehsan

Published Date

2022

The development of a Y-branch symmetric waveguide coupler based on soft lithography approach was presented. This paper focused on the design, fabrication and testing of the symmetric waveguide coupler that produces an optic with power output. The fabrication was done by engraving acrylic to produce a master mould using milling machining tools for optical devices. The device was constructed via soft lithography which duplicated the pattern from the master mould onto a second mould to produce an actual device. Afterward, optical polyme epoxy OG142 was injected into the second mould, of which the product was then put on top of acrylic. The device was completed after curing the optical polymer glue, epoxy OG142 by exposing the assembly on the second mould under UV light until both parts bonded. The results of the tap off ratio testing for asymmetric waveguide coupler were ranged from 21.1 to …

Intermetallic Compound Thickness of Ball Grid Array Solder Joints Under Thermal Cycling Test Using ANOVA

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Azman Jalar,Erwan Basiron,Fakhrozi Che Ani

Published Date

2022/10/19

Thermal cycling testing is an accelerated reliability test that provides confidence that the design and the ball grid array (BGA) components assembly processes are complying with the intended goals of product performance. Nevertheless, the fatigue life models for solder joints can be determined by observing the thickness of intermetallic compound (IMC) layer development on BGA solder joints when subjected to multiple thermal cycling loadings. This paper studies the IMC layer growth variances on BGA components subjected to multiple thermal cycling loadings using ANOVA analysis. The IMC layer thickness data were measured after the cross-sectioning process. Three variables were observed; sample a: BGA balls without thermal cycling loadings, samples b and c: the BGA balls were exposed to 500 and 1000 thermal cycling loadings respectively. Samples b and c were placed in the testing chamber under the …

Thermal Management on the Solder Joints of Adjacent Ball Grid Array (BGA) Rework Components Using Laser Soldering

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Azman Jalar,Zol Effendi Zolkefli,Erwan Basiron

Published Date

2022/9/14

Temperatures for hot air and laser reflow soldering were evaluated for a ball grid array component (BGA) throughout the rework procedure to mitigate the influence of mechanical and thermal-induced damage on the solder joints quality and reliability of the adjacent BGA components on both the printed circuit board assembly (PCBA) sides. Sample H received convection heat from hot air, while sample L received radiation heat from a laser beam. Temperature measurements were obtained with thermocouple wires and analysed to better understand the link between reflow soldering heat source types and heat dissipation on adjacent rework components. The findings were displayed using individual value plots and standard deviation charts. With a radiation heat source, laser reflow soldering is capable to decrease the highest temperatures on the adjacent components during the rework procedure up till 10%. It may …

Effect of heat shield locations on rework-induced thermal management in ball grid array solder joint

Authors

Adlil Aizat Ismail,Maria Abu Bakar,Abang Annuar Ehsan,Azman Jalar,John Burke,Zol Effendi Zolkefli,Erwan Basiron

Journal

Scientific Reports

Published Date

2022/9/6

This study investigated the effectiveness of heat shield placement locations during the rework process to avoid thermal and mechanical damage to adjacent ball grid array components and their solder joints on double-sided printed circuit board assembly. Three types of heat shield placement locations were used: sample X, individual heat shield placement on adjacent components of the rework location; sample Y, a U-shaped, and sample Z, a square-shaped heat shield placed respectively at the heat source location. The dye and pull test results, infrared thermography, and temperature measurements were analysed to understand the relationship between the location of the heat shield and solder joint damage during rework. Heat shield placement at the heat source location on the reworked component can reduce the peak temperatures on the adjacent rework component locations by up to 8.18%. The peak …

Sensitivity optimization of U-shaped fiber optics based on the Taguchi method

Authors

Noor Azie Azura Mohd Arif,Abang Annuar Ehsan

Journal

OSA Continuum

Published Date

2021/7/15

The structure of macrobending fiber optics is an ideal structure for constructing fiber optic sensors. This study presents a new design and implementation of U-shaped fiber optics. The basic geometric parameters of U-shaped fiber optics, such as dimension size or curve radius, are analyzed. The Taguchi method was used to optimize the effects of the control and noise factors with respect to dimension size, loop, wavelength, and core size. The control factors were varied at different levels to achieve a novel sensitivity response optimization of the wavelength and core size. The quality characteristics of the signal-to-noise ratio (larger-the-better characteristics) were used to determine the effect of the control parameters in the data analysis. The data of the sensitivity response was analyzed to predict the performance of the U-shaped fiber optics. Results indicate that, by using the Taguchi method, the best control factor …

Sensitivity Enhancement of Heterocore Macrobend Fiber Optics by Adding a ZnO Film

Authors

Noor Azie Azura Mohd Arif,Dilla Duryha Berhanuddin,Abang Annuar Ehsan

Journal

International Journal of Optics

Published Date

2021/4/30

Optical fibers with high sensitivity are in demand due to their great potential in sensor application. Semiconductors, such as ZnO, are good materials. Using them as a second cladding offers opportunities in realizing next-generation multimaterial fiber optics. COMSOL Multiphysics is used to simulate heterocore macrobend fiber optics with the same curvature radius but different values of refractive index and thickness of ZnO films. The optimum thickness of ZnO films is identified by determining the loss of optical fibers. Macrobend heterocore fiber optics by adding ZnO thin film has been established by simulating and interpreting the relationship in terms of transmission and refractive index in the evanescent field. These results will provide a reliable fundamental to guide the performance in practice.

Micro Milling Process for the Rapid Prototyping of Microfluidic Devices

Authors

Muhammad Syafiq Rahim,Abang Annuar Ehsan

Published Date

2021/4/7

Micro milling process has become an attractive method for the rapid prototyping of micro devices. The process is based on subtractive manufacturing method in which materials from a sample are removed selectively. A comprehensive review on the fabrication of circular and rectangular cross-section channels of microfluidic devices using micro milling process is provided this review work. Process and machining parameters such as micro-tools selection, spindle speed, depth of cut, feed rate and strategy for process optimization will be reviewed. A case study on the rapid fabrication of a rectangular cross section channel of a microflow cytometer device with 200 um channel width and 50 um channel depth using CNC micro milling process is provided. The experimental work has produced a low surface roughness micro channel of 20 nm in roughness and demonstrated a microflow cytometer device that can produce hydrodynamic focusing with a focusing width of about 60 um.

Research Article Sensitivity Enhancement of Heterocore Macrobend Fiber Optics by Adding a ZnO Film

Authors

Noor Azie Azura Mohd Arif,Dilla Duryha Berhanuddin,Abang Annuar Ehsan

Published Date

2021

Optical fibers with high sensitivity are in demand due to their great potential in sensor application. Semiconductors, such as ZnO, are good materials. Using them as a second cladding offers opportunities in realizing next-generation multimaterial fiber optics. COMSOL Multiphysics is used to simulate heterocore macrobend fiber optics with the same curvature radius but different values of refractive index and thickness of ZnO films. e optimum thickness of ZnO films is identified by determining the loss of optical fibers. Macrobend heterocore fiber optics by adding ZnO thin film has been established by simulating and interpreting the relationship in terms of transmission and refractive index in the evanescent field. ese results will provide a reliable fundamental to guide the performance in practice.

Manufacturing of Polymer-based 1× 2 Y-branch Symmetric and Asymmetric Waveguide Coupler through Moulding Technique

Authors

Mohd Shafiq Ghazali,Fadhlur Rahman Mohd Romlay,Abang Annuar Ehsan

Journal

International Journal of Automotive and Mechanical Engineering

Published Date

2021/9/19

Manufacturing of Y-branch coupler depends on high technology production equipment and in-factory accuracy assembly tools. The manufacturing of a 1× 2 Y-branch symmetric and asymmetric waveguide coupler based on the mould replication process and Epoxy OG142 as an optical core is presented; an alternative to provide a less complex technique. The polymer optical waveguide adopted two basic designs: the 1× 2 Y-branch symmetric coupler as the core structure and the 1× 2 asymmetric coupler that allows non-symmetric optical splitting. This paper focused on the main structure fabrication of the 1× 2 symmetric and asymmetric waveguide coupler that produces a power output. The fabrication was done by engraving acrylic to produce a master mould using CNC machining tools for optical devices. Both 1× 2 devices were made via soft lithography, which duplicated the pattern from the master mould onto a second mould to produce an actual device. Optical polymer epoxy OG142 was injected into the second mould, of which the product was then put on top of acrylic. The device was completed after curing the optical polymer glue, epoxy OG142, by exposing the assembly on the second mould under UV light until both parts bonded. The difference between the simulation and design TOFR value was only±2%. This showed that the simulation and design are in good agreement, which provides similar performance.

Bend loss fiber optics design based on sinusoidal and ellipse configurations

Authors

Noor Azie Azura Mohd Arif,Dilla Durhya Burhanuddin,Sahbudin Shaari,Abang Annuar Ehsan

Journal

Optica Applicata

Published Date

2021

Bending losses in optical fibers comprise one of the extrinsic attenuations that contribute to optical loss and they are essential for optical fiber bending sensor applications. This work investigated the optical loss in a standard single-mode step-index fiber optics due to fiber bending at 1550 nm wavelength. Variations in macro-bending loss with curvature radius and turn number have been measured. Curvature radius and turn number are examined for sinusoidal and elliptical shaped bending configurations. It has been found that the loss increases as the bending radius and number of turns increase. The result also showed that elliptical shaped bending configuration produced more loss in contrast to that of sinusoidal shaped at bending angles of 180 and 360. The study on the macro-bending loss in terms of curvature radius and turn number for both elliptical and sinusoidal shaped bending configurations is beneficial for future fiber optic sensor applications.

See List of Professors in Abang Annuar Ehsan University(Universiti Kebangsaan Malaysia)

Abang Annuar Ehsan FAQs

What is Abang Annuar Ehsan's h-index at Universiti Kebangsaan Malaysia?

The h-index of Abang Annuar Ehsan has been 6 since 2020 and 13 in total.

What are Abang Annuar Ehsan's top articles?

The articles with the titles of

Customizing ultraviolet curable polymer‐ink properties via reactive diluent modification and viscosity control

Indoor Environmental Quality in Micro & Nanoelectronics Laboratories at IMEN, Research Complex, UKM

Air-Processable Perovskite Solar Cells by Hexamine Molecule Phase Stabilization

Optoelectrical properties of hexamine doped-methylammonium lead iodide perovskite under different grain-shape crystallinity

Design structure of ZnO coated on hetero-core fiber optic

Intensity Loss of ZnO Coated on Fiber Optic

Cardinal and ordinal directions approach in investigating arrayed solder joints crack propagation of ball grid array semiconductor packages

Thermal-Induced Damage on Solder Joints of High-Density Adjacent Ball Grid Array Components During the Rework Process

...

are the top articles of Abang Annuar Ehsan at Universiti Kebangsaan Malaysia.

What are Abang Annuar Ehsan's research interests?

The research interests of Abang Annuar Ehsan are: Photonics, Optical Design, Manufacturing

What is Abang Annuar Ehsan's total number of citations?

Abang Annuar Ehsan has 676 citations in total.

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