MEMS BUBBLE GENERATOR FOR LARGE STABLE VAPOR BUBBLES

摘要

A MEMS vapour bubble generator that uses a heater in thermal contact with a liquid to generate a bubble. The heater is energized by an electrical pul se that is shaped to have a relatively low power, sub-nucleating portion and a high power portion that nucleates the bubble. The thermal energy transfer red to the liquid by the sub-nucleating portion speeds up the nucleation of the bubble across the surface of the heater during the nucleating portion. T his produces larger, more stable bubble having a regular shape.