Spray pyrolysis is a process in which a thin film is deposited by spraying a solution on a heated surface, where the constituent reacts to form a chemical compound. The chemical reactants are selected such that products other than the desired compound are volatile at the temperature of deposition. The process is particularly useful for the deposition of oxides and has long been a production method for a long period for applying a transparent electrical conductor of Tin oxide (SnO2) or Stannic oxide to glass.
Holmarc’s spray pyrolysis equipment automates the various fatigue and error creating possibilities when the process is performed manually. Moreover, parameters like dispensing rate of the solution and speed of spray head movement are precisely controlled which are difficult to be controlled in a manual process. A positive displacement pump controlled by stepper motor and microprocessor is used to dispense solution as per requirement. The spray head movement is also controlled by stepper motor driven linear stages in X and Y direction. The temperature of the substrate heater plate is controlled independently through a dedicated controller. |
