Refining the Photolithography Procedure for the Use of Measuring Hall Voltages
School Name
Governor's School for Science and Mathematics
Grade Level
12th Grade
Presentation Topic
Physics
Presentation Type
Mentored
Oral Presentation Award
3rd Place
Abstract
The purpose of this research was to reduce the time required to perform an experiment that tested the Hall effect under the effects of certain organic compounds. In the experiment, the scientist must bond wires to a thin film of metal and a mounting chip that connects the film to an electromagnet lock-in. My job was to remove the long process of wire bonding from this experiment. To accomplish that job, I was given a wired plate, and was instructed to redesign a Hall bar pattern to fit it, as well as find an efficient way to create the Hall bar. I had to account for the process of photolithography, which included creating a new shadow mask, finding the optimum way to expose the silicon chips on which the Hall bars were placed, while ensuring that they were still usable in the lab. The final results were a much larger Hall bar, shadow masks constructed of ink and metallic paint on transparency sheets, scanned by sweeping light across the sample in strips.
Recommended Citation
O'Dell, Ian, "Refining the Photolithography Procedure for the Use of Measuring Hall Voltages" (2018). South Carolina Junior Academy of Science. 71.
https://scholarexchange.furman.edu/scjas/2018/all/71
Location
Neville 306
Start Date
4-14-2018 12:00 PM
Presentation Format
Oral and Written
Refining the Photolithography Procedure for the Use of Measuring Hall Voltages
Neville 306
The purpose of this research was to reduce the time required to perform an experiment that tested the Hall effect under the effects of certain organic compounds. In the experiment, the scientist must bond wires to a thin film of metal and a mounting chip that connects the film to an electromagnet lock-in. My job was to remove the long process of wire bonding from this experiment. To accomplish that job, I was given a wired plate, and was instructed to redesign a Hall bar pattern to fit it, as well as find an efficient way to create the Hall bar. I had to account for the process of photolithography, which included creating a new shadow mask, finding the optimum way to expose the silicon chips on which the Hall bars were placed, while ensuring that they were still usable in the lab. The final results were a much larger Hall bar, shadow masks constructed of ink and metallic paint on transparency sheets, scanned by sweeping light across the sample in strips.
