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Michael Padilla, 277-1816

January 31, 2002

Espanola Native part of UNM team scheduled for NASA flight at Johnson Space Center

Espanola native Thomas Gamble is among a team of students from the University of New Mexico Department of Chemical and Nuclear Engineering that will fly an experiment on board the microgravity KC-135 airplane at Johnson Space Center on March 7. Gamble serves as team leader for the project.

The project is part of the NASA Reduced Gravity Student Flight Opportunities Program.

This is the second year in a row the department has won this national competition allowing the students to investigate the effect of weightlessness on spin-coating of computer wafers. The members of UNM, “S.P.I.N. Doctors” (Study of Photoresist in New Mexico) team, will fly on two consecutive days, two members each day for two hours.

“I am extremely excited about the project,” Gamble said. “I will be flying, and I can’t wait.”

Gamble said that NASA wants to make sure that everything will be in order so that the experiments can go smoothly and without any problems.

“This is indeed great national recognition for UNM and a great opportunity and hands-on experience for our students,” said Mohamed El-Genk, faculty advisor for the project.

Spin-coating a photoresist polymer over a silicon substrate is traditionally one of the first steps in the manufacture of microprocessors in the semiconductor industry. This process is also widely employed in a number of other applications, including flat-screen display coatings, compact disks and television tube phosphor coatings. El-Genk said spin-coating is a fairly simple procedure involving minimal equipment and time.

The overall objectives of the experiment are to determine what role gravity plays in the spin-coating process and to ascertain whether or not spin-coating represents a viable method to coat a substrate with a thin, uniform film of material in a zero-gravity environment.

El-Genk said the procedure on board of the KC-135 airplane represents a fascinating, though somewhat complicated, fluid dynamics problem.

“Through the proposed experimentation, we hope to quantify the role gravity plays in the process, as well as determine if spin-coating may someday be feasible in a space environment,” El-Genk said.

The experiment will be carried out similarly to last year’s experiment. A modified spin-coater will be adapted for operation aboard the plane. The experiment will require two operators: one to store prepared wafers and place a clean wafer into the instrument, the other to change the parameters on the instrument control panel. Upon return to the lab, the photoresist films of each wafers prepared aboard the KC-135 will be profiled. This will help determine the overall thickness of the photoresist film, as well as the characteristics of the film at the edge of the wafer.

The specific objectives of the experiments are to collect a large enough database on spin-coating in microgravity and examine the effects of different operation parameters such the spin speed, the dispense rate of the photoresist polymer, and to obtain high-quality video footage of the spin-coating process in microgravity. In addition, the objective is to compare the characteristics of the photoresist film developed in microgravity, and examine the reproducibility of the results by performing repetitive experiments at the same condition in microgravity.

El-Genk said the team hopes to conduct several outreach activities to increase awareness regarding the experiment. Presentations will be conducted at Eldorado and Sandia High Schools as well as at other public schools. A video will also be created to highlight the experiment.

The faculty co-advisor is Robert Busch, chemical and nuclear engineering professor. The external technical advisor is Dr. Steve Thornberg from Sandia National Laboratories. Thornberg collaborated with UNM last year and provided all the hardware used in the experiment. The UNM team consists of chemical and nuclear engineering undergraduate students, Jason Brown, Tiffany Schofield, Brett Andrzejewski, Julie Nguyen, Daniel Torres and Thomas Quirk. High school students include Chris Cutler, Eldorado High School, and Corey Flack, Sandia High School.

Gamble is majoring in chemical engineering and will be graduating in May. Gamble works at Sandia National Laboratories. His job is to save water and energy in the building cooling systems.

“I have applied to grad school at UNM and I will be pursuing an MS, with the option to continue on for a PhD,” he said. “I want to try research and if I am good at it, I will pursue a PhD.”

During his free time, Gamble spends most of his free time with his son Harper, 6. In addition, he practices drums, guitar, singing and songwriting. He also likes to rock climb, hike, camp, play racquetball, ride motorcycles, play video games, and visit family and friends.

Gamble’s parents are Sandra DeAguero and Thomas K. Gamble.

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