Team 14 Joe Grady James Crow Hongyu Chen Prakalp Sudhakar Victor Villagomez Client/Faculty Advisor: Dr. Gary Tuttle

The objective of the senior design project is to design a new set of temperature controllers to use on a set of diffusion furnaces located at the Microelectronics Research Center. The project goals include: Temperature calibration of the furnaces Implementing of new temperature controllers into the current furnace system Providing a computer interface so that temperature of the furnaces can be controlled and monitored remotely. Providing extended remote control of the valves that control the gases released in the furnace, if time and funds permit.

Controller must have a temperature tolerance within +/- 1 degree Celsius Controller must be digital and programmable (∆T/ ∆t) Controller must have communication capability Controller must be able to sample and store information for every cycle Controller must be able to control temperatures independently of each section

Software must be able to monitor and control the parameters of the temperature controller Software must be able to support simultaneous use by multiple students Software must be able to display graphs of the process and of chemical flow Software needs to be accessed online via web browser Graphical interface of the software must be user-friendly Error checking and deviation

The new controllers need to be placed where the old ones were so they need to able to fit within a certain space Connectors must be compatible with the new controller

Baud Rate = 4800 Data Bits = 8 Parity = N Stop = 1 Operating Protocol Controllers do not initiate communication, Command Module does. All communication is in ASCII format To start communication Command Module sends alert code followed by ID

Parts and Materials: a) Suitable controller(s) b) Miscellaneous parts c) Poster Without Labor $1, $50.00 With Labor $1, $50.00 Services: a)Website Upkeep (for 1 year)$60.00 Labor ($12.50 per hour): a)Crow, James b)Villagomez, Victor c)Sudhakar, Prakalp d)Grady, Joe e)Chen, Hongyu $ Parts and Materials: a) Suitable controller(s) b) Miscellaneous parts c) Poster Without Labor $ $0.00 With Labor $ $0.00 Services: a)Website Upkeep (for 1 year)$0.00 Labor ($12.50 per hour): a)Crow, James b)Villagomez, Victor c)Sudhakar, Prakalp d)Grady, Joe e)Chen, Hongyu $ Current Expenses Total Expected Expenses

The existing controller/oven has the thermocouple’s negative (-) leads connected internally to the oven, but the new controller’s require them to be directly connected. The existing SCR firing circuits are 0-5 mA current controlled devices, but the new controller’s output to the SCR firing circuit is designed to operate a 0-5 V voltage controlled device.

Professor Thorough knowledge about current microcontrollers, and advice for digital microcontrollers User Manuals Manual for current analog microcontrollers Manual for new digital microcontroller. Manufacturers Websites to purchase new digital microcontrollers Omega.com – New microcontroller Easysw.com – Serial Programming Guide