S. Hassan

A feasibility study of roll to roll printing on graphene

Roll to roll process is one of the famous printing techniques that are possible to create graphic and electronic device on variable substrate by using conductive ink. Graphene is an example of material that can be used as printing ink which usually used in producing micro-scale electronic devices. Here, it is proposed that extending roll to roll printing technique into the multiple micro-scale printing fine solid line onto substrate by using graphene as a printing ink. Flexography is a high speed roll to roll printing technique commonly used in paper printing industry. And this study elaborates the feasibility of graphene as a printing ink use in combination of flexography and micro-contact or micro-flexo printing for micro fine solid line. This paper will illustrates the review of graphene in producing multiple micro-solid lines printing capability for the application of printing electronic, graphic and bio-medical.

Numerical Analysis of Laser Heating for Laser Assisted Micro Milling Application

The promising processing techniques of micro scale parts are very important in products miniaturization and functions enhancement. Combination of two or more processing techniques gives better processing performance especially when dealing with difficult-to-cut materials. For that reason, the combination of laser beam and micro milling process has been widely studied and proven efficient in reducing cutting force and tool life extension. However, this process needs a precise temperature control in order to eliminate heat effect generated by laser beam irradiation. In this study, temperature distributions are determined numerically to characterize the melted zone and heat affected zone geometry. From the results, the estimation of tool and micro milling cutter distance together with the allowable depth of cut are determined.

Angle resolved x-ray photoelectron spectroscopy (ARXPS) analysis of lanthanum oxide for micro-flexography printing

Micro-flexography printing was developed in patterning technique from micron to nano scale range to be used for graphic, electronic and bio-medical device on variable substrates. In this work, lanthanum oxide (La2O3) has been used as a rare earth metal candidate as depositing agent. This metal deposit was embedded on Carbon (C) and Silica (Si) wafer substrate using Magnetron Sputtering technique. The choose of Lanthanum as a target is due to its wide application in producing electronic devices such as thin film battery and printed circuit board. The La2O3 deposited on the surface of Si wafer substrate was then analyzed using Angle Resolve X-Ray Photoelectron Spectroscopy (ARXPS). The position for each synthetic component in the narrow scan of Lanthanum (La) 3d and O 1s are referred to the electron binding energy (eV). The La 3d narrow scan revealed that the oxide species of this particular metal is mainly contributed by La2O3 and La(OH)3. The information of oxygen species, O2- component from O 1s narrow s...

Surface adhesion study of La2O3 thin film on Si and glass substrate for micro-flexography printing

Adhesive property can be described as an interchangeably with some ink and substance which was applied to one surface of two separate items that bonded together. Lanthanum oxide (La2O3) has been used as a rare earth metal candidate as depositing agent or printing ink. This metal deposit was embedded on Silica (Si) wafer and glass substrate using Magnetron Sputtering technique. The choose of Lanthanum oxide as a target is due to its wide application in producing electronic devices such as thin film battery and printed circuit board. The La2O3 deposited on the surface of Si wafer and glass substrate was then analyzed using Angle Resolve X-Ray Photoelectron Spectroscopy (ARXPS). The position for each synthetic component in the narrow scan of Lanthanum (La) 3d and O 1s are referred to the electron binding energy (eV). This research will focus on 3 narrow scan regions which are C 1s, O 1s and La 3d. Further discussion of the spectrum evaluation will be discussed in detail. Here, it is proposed that from the ad...

A study of nano structure by roll to roll imprint lithography

Imprint lithography process is a unique printing technique that create graphic, electronic and biomedical printed on substrates. PET plastics are an example of materials that can be used as printing substrate in producing nano-scale electronic and medical devices. Here, it is proposed that extending imprint lithography technique into the multiple nano-structure printing fine solid lines onto substrate. Imprint lithography is a low cost printing technique commonly used in manufacturing and printing industry. This study exhibit successful fine solid lines imprinting below 1 micrometer in line width, gap and height on polyethylene-terephthalate (PET) substrate. This paper illustrates the use of imprint lithography method in producing multiple nano-solid lines printing capability as application of printing electronic, graphic and bio-medical.

Investigation of carbon nanotube ink with PDMS printing plate on fine solid lines printed by micro-flexographic printing method

Micro-flexographic printing which is combination of flexography and micro-contact printing is a unique printing technique that create graphic, electronic and biomedical printed image on variable substrates. Therefore, an investigation for its potential usage in global area of printing hence a research for suitable ink and printing plate related to this process is vital. This paper will focus on investigating the printability of Carbon Nanotube (CNT) ink with polydimethylsiloxane (PDMS) printing plate. There are two types of CNTs ink which are solvent base and water base. A printing trial has been carried out in comparison with CNTs inks and PDMS printing plate with fine solid lines image on it to check the suitability of the printing plate development for micro-flexographic printing technique. The result shows that CNT water base ink is suitable with PDMS printing plate in printing fine solid lines image.

Dehydration of Traditional Dried Instant Noodle (Mee Siput) Using Controlled Temperature & Humidity Dryer

Drying process is an essential step to produce instant noodles. Yet, the industries especially Small and Medium Enterprises (SMEs), is seeking for an efficient method to dry the noodles. This paper discusses the performance of an invented drying system which employed heating and humidifying process. The drying system was tested using 30 kilogram of the raw noodle known as “Mee Siput”. Temperature controlled system were used in the study to control the temperature of the drying process and prevent the dried noodles from damage by maintaining the temperature of lower than 80oC. The analysis shows that the system was drastically decreased the humidity from 80% to 40% just after 200 minutes of the drying process. The complete dehydration time of noodle has also decreased to only 4 hours from 16 hours when using traditional drying system without sacrificed the good quality of the dried noodle. In overall, the invented system believed to increase the production capacity of the noodle, reduce cost of production which would highly beneficial for Small Medium Industries (SMEs) in Malaysia.

Development of automated control system for kuih penderam stamping machine

It is essential to design a control system for stamping process in Kuih Penderam production. The main problem is how to produce the Kuih Penderam due to high demand but low in energy consumption. The objective of this study is to convert the system of Kuih Penderam stamping process from manual system to automatic system. The system is consists of the software and components to be used. There are few components that have been use on designing the automatic system which is PLC systems, compressor, sensors, connectors and push buttons. The results of the reliability for the system shows that all the LED lights are function when the signal is connected to the PLC system on the circuit in a direct connection. This case show every components testing is working properly.

Study on Layer Fabrication for 3D Structure of Photoreactive Polymer Using DLP Projector

This paper presents a research on 3D part fabrication from composition of photo initiator (Phenylbis (2,4,6-trimethylbenzoyl)), photo absorber (Sudan I) and 1, 6-Hexanediol polymer effect based on curing parameters. A DLP projector was used as energy light source which initiated the photo reactive polymer at three different light source distances with three different exposed time to evaluate photoreactive polymer solidification phenomena. The experiment results obtained shows that Sudan I composition, light intensity value and exposure time of the varied photo absorber give significant effect to layer thicknes, surface roughness and hardness value. These works also prove that photo absorber composition solution gave a different mechanical properties effect for 3D microstructure fabrication.

Dynamic Analysis of Micro-Milling Machine

Dynamic analysis is very important in developing machine structure to sustain the required accuracy, reliability and productivity. The objective of this study is to conduct a dynamic and modal analyses of micro-milling machine. The machine designs were predicted by comparing the Finite Element Analysis (FEA) using ANSYS software and experimental hammer testing. Two micro-milling machine designs have been proposed. Natural frequency and mode shape was analyzed in modal analysis which show the result that first mode recorded frequency of 92.086 Hz for design A and 154.78 Hz for design B. Natural frequency of design B was higher than design A. From the comparision, it can be concluded that Design B was selected as a best design.