Study of a portable microsystem based on electrowetting on dielectric

• Main Authors: Chih-yuan Hsu, 許智淵
• Other Authors: Ling-sheng Jang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/35344022669461654853

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 95 === Electrowetting on dielectric (EWOD) moving droplet by surface tension effects offers some advantages, including simplicity of fabrication, control of minute volumes, low cost, substitute for micro-mixers and others. In this work, a portable microsystem including the EWOD device, a 9V battery, an ATmega8535 microprocessor, a DC/DC converter using transformerless technology, two regulator ICs, a switch circuit, a keyboard and LCD module has been developed. The microsystem is able to generate a stable square wave in the range of 50~100Vpp and 1~5k Hz to drive the EWOD device. In this experiment, the EWOD device is driven by a square wave of 60Vpp and 3k Hz. Two basic operations, transporting and cutting are demonstrated on square-shaped, interdigitated electrodes. The advantage and disadvantage of the interdigitated electrode are discussed comparing with the normal square-shaped electrode.