For the first time, five undergraduate students in their final year of study Department of Electronic and Telecommunication Engineering was given the opportunity to experience the full fabrication of complementary metal-oxide semiconductor (CMOS) process. As a part of initiative to promote mutual understanding between Hiroshima University, Japan and University of Moratuwa, those students took were given opportunity to participate in an all-expense paid workshop on CMOS fabrication at Research Institute for Nano-device and Bio Systems of Hiroshima University.
Main objective of this program is to give the basic understanding of the following aspects of CMOS Transistor Fabrication Process, with hands on experience working inside a Class 10 super clean room, to the students who participate in the program.
• Designing CMOS circuits using ‘Layout Editor’
• Identifying the CMOS Fabrication Process and implement the designed circuits inside Class 10 Super Clean Room
• Electrical Parameter Measurements of Fabricated Circuits
• Analyzing the Results
During the workshop each student were given opportunity to design their own circuits in a 4mm2 area and fabricate them in a Class 10 super clean room, enabling them to experience first-hand mask lithography, visual inspection of Silicon wafer for defects, etching, doping and metal interconnect formation. In the final stage of the fabrication process each student had to measure the electrical characteristics of the fabricate circuit to verify whether the fabrication was done accurately. Afterwards a presentation of results and discussion was held with the participation of Prof. Shin Yokoyama, Director of Research Institute for Nano-device and Bio Systems.
This workshop is annually offered to a group of foreign students by Hiroshima University and it is the first time where Sri Lankan students participated with the coordination of Mr. Milantha De Silva who is currently a PhD candidate of Research Institute for Nano-device and Bio Systems, Hiroshima University and senior lecturer Dr. Tharaka Samarasingha of University of Moratuwa.
• Ashen Ekanayake
• Sasindu Wijeratne
• Gajalakshan Balakrishnar
• Omega Gamage
• Hasitha Algewatta
Figure: Design Team, IC designed