Institute of Nano Electronic Engineering INEE

Kuala Perlis, Malaysia

Institute of Nano Electronic Engineering INEE

Kuala Perlis, Malaysia

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Haarindraprasad R.,Institute of Nano Electronic Engineering INEE | Hashim U.,Institute of Nano Electronic Engineering INEE | Gopinath S.C.B.,Institute of Nano Electronic Engineering INEE | Gopinath S.C.B.,University Malaysia Perlis | And 6 more authors.
PLoS ONE | Year: 2015

The performance of sensing surfaces highly relies on nanostructures to enhance their sensitivity and specificity. Herein, nanostructured zinc oxide (ZnO) thin films of various thicknesses were coated on glass and p-type silicon substrates using a sol-gel spin-coating technique. The deposited films were characterized for morphological, structural, and optoelectronic properties by high-resolution measurements. X-ray diffraction analyses revealed that the deposited films have a c-axis orientation and display peaks that refer to Zn O, which exhibits a hexagonal structure with a preferable plane orientation (002). The thicknesses of ZnO thin films prepared using 1, 3, 5, and 7 cycles were measured to be 40, 60,100, and 200 nm, respectively. The increment in grain size of the thin film from 21 to 52 nm was noticed, when its thickness was increased from 40 to 200 nm, whereas the band gap value decreased from 3.282 to 3.268 eV. Band gap value of ZnO thin film with thickness of 200 nm at pH ranging from 2 to 10 reduces from 3.263eV to 3.200 eV. Furthermore, to evaluate the transducing capacity of the ZnO nanostructure, the refractive index, optoelectric constant, and bulk modulus were analyzed and correlated. The highest thickness (200 nm) of ZnO film, embedded with an interdigitated electrode that behaves as a pH-sensing electrode, could sense pH variations in the range of 2-10. It showed a highly sensitive response of 444 μAmM-1cm-2 with a linear regression of R2 =0.9304. The measured sensitivity of the developed device for pH per unit is 3.72μA/pH. © 2015 Haarindraprasad et al.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Zaki M.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This paper presents the development of gas chamber for testing and characterization of gases with different concentrations. By using glass as the chamber material, it able to provide strong and air-tight structure and prevent odor chemical gases from leaking which can effect the environment. The glass chamber also enables easy monitoring (from the external) of the hardware connections, to ensure that they are always intact and in good condition. The measurement plate in the chamber consists of a copper probe, sensor, heater and conductor. A temperature within the range of 200 °C to 300 °C is required to activate the sensing mechanism. Initial testing shows that the chamber provides well enclose environment for gases detection. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Azman A.H.,Institute of Nano Electronic Engineering INEE | Ayub R.M.,Institute of Nano Electronic Engineering INEE | And 8 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

The capability to grow the manufacturing grade ultra-thin dielectrics hold the key to the continuous miniaturization of semiconductor devices. While the thermally grown SiO2 has been used as a gate dielectric ever since the decades of silicon device began, it appears that the electrical and physical properties of pure SiO2 are not good enough to provide acceptable performance for ultra-thin gate dielectric film. There are many available methods to control the growth of the ultra-thin film. In this paper, we control the growth rate of dry thermal oxidation by incorporating nitrogen gas during the process. The Deal Grove model is universally accepted as the physical model to describe the thermal oxidation process. However, at the initial oxidation stage, this model cannot predict the process satisfactorily. The incorporated nitrogen will neutralize the growth sites at the oxide-silicon interface, which significantly slows down the oxidation process when N2 gas is used as an oxidizing ambient. It would also affect the linear rate constant for the Deal Grove equation where, linear rate (B/A) is the reaction at the Si/SiO2 regent that depend on the oxygen and nitrogen gases. The result was compared with the calculated growth rate, which based on the Deal-Grove model to investigate their correlation. Where for the result, it shows that the linear rate constant (B/A) of deal grove model for the dry oxidation of thickness <25nm, the deal grove model are not accurate, linear rate (B/A) response we're becoming less this is because the deal grove model can't predict the initial stage of the dry oxidation growth. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Zaki M.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This paper studies the development of portable electronic reader for detection of formaldehyde gas sensor. This electronic reader can detect the level of formaldehyde concentration, which later translated into voltage level by using PIC 18F4580 microcontroller. Result shows that high concentration of chemical gas, which decoded to high voltage signal can be displayed on screen reader. Three level of detection is set in the programming i.e. reject, quarantine and low-level voltage conditions which translated into high, medium and low concentration of gas respectively. Finally, the result detected by portable electronic reader is correlated well with real-time PC based multi-meter detection. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Azizah N.,Institute of Nano Electronic Engineering INEE | Nadzirah S.,Institute of Nano Electronic Engineering INEE | And 7 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This research studies the detection of Human Papillomavirus (HPV) by using a colorimetric method for visualizing biotin-labelled DNA probes hybridized to DNA HPV on silicon dioxide (SiO2). In this study, SiO2 was used as substrate to check hybridization between HPV DNA probe and HPV DNA target. HPV is a virus that spreading by sexually transmitted that infected to human especially woman. High-risk HPV that stimulate cervical cancers (CC) is genotypes 16 and 18. Most 70% of CC are due to infection by these genotypes. The efficiency of colorimetric method depends mainly on the sequence of the specific oligonucleotide probe and the way they are attached to the support thin film. The conjugating procedure must be quick, strong by using covalent binding, and reproducible to show immobilization and hybridization process successful. The detection limit of target DNA has been estimated by using fluorescent detection. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Puah A.Y.P.,Institute of Nano Electronic Engineering INEE | Voon C.H.,Institute of Nano Electronic Engineering INEE | And 6 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

As technology advanced from bulky to the tremendous miniature feature size devices, the patterning process changes according to the technology in order to improving the quality of producing a tiny device. However, in research experiment, costing and ease of use is well preferred rather than high throughput outputs. Hence, such low cost photolithography technique which is a crucial part in fabrication process begins from mask design is introduced. A common mask printing on transparency film via inject printers comes in handy for low cost fabrication together with time saving and easy to generate. The only drawback is that printing dimension must not less than 100μm and definitely the bigger the size, the better the resolution of the transparency mask. On the other hand, the less devices that able to fit in a wafer. Design of this mask drawn using AutoCAD drawing tools using multiple trimmed circles that combined with a pair of contact pad. Tangible printed mask enable the next steps of photolithography to be proceed and patterns occurs upon completion. © 2015 IEEE.


Fathil M.F.M.,Institute of Nano Electronic Engineering INEE | Adzhri R.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,Institute of Nano Electronic Engineering INEE | Arshad M.K.M.,University Malaysia Perlis | And 8 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This paper presents the method of preparation and characterization of titanium dioxide (TiO2) thin film before deposition on the channel of field-effect transistor (FET) biosensor devices. The TiO2 is prepared using sol-gel technique and is deposited onto the silicon dioxide (SiO2) surface using spin coater. Three different numbers of coating layers (5, 7, and 9 coating layer) of TiO2 are deposited on three SiO2 layer grown on top of Si substrate for investigation. The samples are baked and annealed before being characterized electrically and morphologically. All these results give a helpful indication for the deposition process of the TiO2 thin film as the FET biosensor device on the silicon-on-insulator (SOI) wafer. © 2015 IEEE.


Hashim U.,Institute of Nano Electronic Engineering INEE | Hashim U.,University Malaysia Perlis | Nadzirah S.,Institute of Nano Electronic Engineering INEE | Azizah N.,Institute of Nano Electronic Engineering INEE | And 2 more authors.
Proceedings - 2015 2nd International Conference on Biomedical Engineering, ICoBE 2015 | Year: 2015

This Detection of specific biomolecules increases interest in the development of biosensor especially for its applicability and complexity. Biomolecules and nanomaterials are the two issues that researchers used to improve electrical signal originating from biochemical reactions. Titanium dioxide nanoparticles (TiO2) on aluminium electrodes-based DNA biosensor were fabricated using conventional photolithography. This device rapidly response since the data comes out quantitatively In order to create a chemical reaction between DNA and the nanoparticles surface, a surface treatment process has been done namely silanization. APTES is used as a coupling agent of TiO2 towards DNA as DNA cannot be directly bonded with the TiO2 surface. Hence, surface modification using APTES diluted in different solvents for further DNA detection is studied. Only certain solvents are suitable to be diluted with APTES and able to generate conductivity. Hence, the conductivity was measured to identify the reaction between the APTES and TiO2 nanoparticles. APTES diluted in acetone gives unreadable conductivity. © 2015 IEEE.


Razak A.R.A.,University Malaysia Perlis | Hashim U.,Institute of Nano Electronic Engineering INEE | Norlia M.I.,University Malaysia Perlis | Hasan S.,University Malaysia Perlis | Shukri F.R.,University Malaysia Perlis
Proceedings of the 2013 IEEE 7th International Power Engineering and Optimization Conference, PEOCO 2013 | Year: 2013

Compact fluorescent lamps are tested under DC operating conditions. Five random samples are evaluated in term of their starting and operation response compared to normal AC environment. Experiment result shows that DC line supply has successfully able to start and operate any conventional CFL at almost the same lux level and power consumption rate of 240ac rms. © 2013 IEEE.


Gan C.L.,Institute of Nano Electronic Engineering INEE | Hashim U.,Institute of Nano Electronic Engineering INEE
2015 10th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2015 - Proceedings | Year: 2015

This paper compares and discusses the influence of shear strength {in terms of (SPMS) shear-per mils-square} of Au and Cu ball bonds on the biased humidity reliability performance in SOIC 8LD leaded package. Biased HAST (Highly Accelerated Temperature and Humidity Stress Test, 130°C, 85%RH) has been carried out to estimate the long term reliability of Au and Cu ball bonds. Lognormal reliability plots have been plotted for the three legs (Control, leg 1 and leg 2) whereby leg 2 is identified to have better mean-time-to-failure (t50) compared to other two legs. Open failure from biased HAST 96 hours, 192 hours are subjected for SEM cross-sectioning and found typical interfacial CuAl IMC (intermetallic compound) corrosion microcracking. HAST failure rates have been analyzed and the Cu ball bond lifetime has been established by using Peck model. The obtained Cu ball bond lifetime, of leg 2 is greater than 25 years and belongs to wearout reliability data point. This proves significant influence of SPMS on biased HAST failure rate. The higher the ball bond shear strength the lower the failure rate of biased HAST test. Hence, we should implement control on the average SPMS of ≥ 7.50 g/mil2. However, the minimum SPMS should have been controlled at minimum ≥ 6.5 g/mil2. © 2015 IEEE.

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