Mohd Sallehuddin Yusof

An Investigation into Printing Processes and Feasibility Study for RFID Tag Antennas

This paper will explain a study of several printing process (screen printing, flexography, gravure and ink jet printing) for RFID antennas transponder. The potential of each process will also be investigated. A current sample of RFID is selected, and the antenna processes have been identified, and the comparison of antenna read range will be exhibited.

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.

Exploration of Fine Lines Profile Effects in Flexographic Printing

Line profile is an important consideration in printing functional devices particularly in printing very fine line for electronic applications. Since laser machining provides the opportunity to apply extreme fine lines with different profiles where unachievable mechanically. Laser ablated printing plate are costly to produce, hence it is appropriate to investigate this within a computational framework beforehand. Therefore several designs will be investigated with different geometry as the variables using both linear elastic and non linear hyperelastic models. The results exhibits that finite element analysis serves appropriately as an exploration tool where it worked well with experimental results.

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...

Cost Reduction Through Value Engineering Practices in Manufacturing Assembly

Value Engineering (VE) is important tool to company in global market competition to providing a demand. VE process can provide for company continued growth and prosperity if applied properly. VE is defines as the systematic application of recognized techniques, which identify the function of product or service, establishes a monetary value for that function and provides the necessary function reliability at the lowest overall cost. This paper will presents a process on how to apply VE tools in manufacturing company. Therefore, we would like to study the application of VE approach method and at the same time investigating how much cost reduction can be done. The function of product will be defining and cost reduction is suggested by proposing alternative method to achieve that function. However the function quality is never degrading. The result is showed that 60% cost reduction can be proposed.

A Preliminary Study of PDMS Stamp towards Flexography Printing Technique: An Overview

Polydimethylsiloxane (PDMS) commonly used for microcontact printing is essential towards the successful introduction of high speed printing of reel-to-reel or reel-to-plate manufacturing processes. Here, it is proposed that extending flexography printing method into the multiple micro-scale printing solid line onto subtract by using PDMS stamp as a plate. Flexography is a high-speed technique commonly used for printing onto substrates in a lot of paper printing industry. It was introduces a decade ago where it is very useful for large production. In this area of printing, the expanding demand on printing electronics leads to a lot of study needed for high speed and large production of electronic industries. This work elaborates the feasibility of PDMS stamp (12in x 4in) use in flexography printing for multiple micro solid lines. It will undergo by using simple and inexpensive fabrication PDMS mold process. This paper illustrates the use of PDMS in microcontact printing fusing with flexography printing to produce multiple micro-solid line printing capability by using conductive ink as application of printing electronic industry applications.

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.

An Investigation onto Polydimethylsiloxane (PDMS) Printing Plate of Multiple Functional Solid Line by Flexographic

Recently low cost production is vital to produce printed electronics by roll to roll manufacturing printing process like a flexographic. Flexographic has a high speed technique which commonly used for printing onto large area flexible substrates. However, the minimum feature sizes achieved with roll to roll printing processes, such as flexographic is in the range of fifty microns. The main contribution of this limitation is photopolymer flexographic plate unable to be produced finer micron range due to film that made by Laser Ablation Mask (LAMs) technology not sufficiently robust and consequently at micron ranges line will not be formed on the printing plate. Hence, polydimethylsiloxane (PDMS) is used instead of photopolymer. Printing trial had been conducted and multiple solid lines successfully printed for below fifty microns line width with no interference between two adjacent lines of the printed images.

PCL/PLA Polymer Composite Filament Fabrication using Full Factorial Design (DOE) for Fused Deposition Modelling

In this study, Polycaprolactone / Polylactice Acid (PCL/PLA) composite are used to fabricate filament wire with the specific diameter, which is in the range of 1.75 to 1.80 mm. Full factorial experimental design technique was used to study the main effects and the interaction effects between operational parameter which is (A) die temperature, (B) roller puller speed, (C) spindle speed and (D) inlet temperature. Besides that, there are two levels (-1 and +1) and the response are filament wire diameter. There are 16 numbers of runs and plus 8 centre points per blocks which makes the runs into 24 runs. From the experiment it shows that there are four factor that are significant effects on the filament wire diameter which is A, B, C and BC. The optimum parameter setting are also determined and there are 10 suggestions to achieve the target with different setting of parameter. The margin error for confirmation run is below than 15% when the parameter set at 6 Hz spindle speed, 4.99 rpm roller puller, 100.31 °C die temperature and 79.65 °C inlet temperature which can be noted that the confirmation run result is acceptable. The optimization parameter setting can use to continue in Fused Deposition Modelling (FDM). Filament wire from PCL/PLA are succesfully fabricated with acceptable diameter size and ready to be used for Fused Depotion Modelling process (FDM).