PROJECT TITLE :
Development of a Heat Sink With Periodic Asymmetric Structures Using Grayscale Lithography and Deep Reactive Ion Etching
This letter describes the fabrication and development of a completely unique heat sink for two-part liquid cooling of electronics. The surface of the warmth sink is uneven in the shape of sawtooth ratchets with the long slope at an angle of twenty four$^circ$ and is enhanced with reentrant cavities, that act as vapor trapping sites. The sawtooth ratchets were fabricated using grayscale lithography and deep reactive ion etching and also the reentrant cavities using anisotropic etching. In pool boiling experiments with deionized water, surface asymmetry results in a web force imbalance performing on the vapor bubbles departing from the reentrant cavities, thereby resulting in bubbles departing at an angle with instantaneous velocities in far more than 60zero mm/s. This novel surface developed demonstrates the ability to result lateral motion of bubbles and therefore the liquid in vicinity.
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