Evaluate Study on Electrostatic Control Efficiency in Electronics Industry

• Main Authors: Jack Liu, 劉育誠
• Other Authors: Chuah Yew Khoy
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/88614344765892267907

碩士 === 國立臺北科技大學 === 冷凍與低溫科技研究所 === 92 === This thesis is a study on the control and the performance design of Ionizers of Electrostatic Discharge (ESD) systems. On the aspects of ESD control, grounding is most effective economically in eliminating static charge. The grounding of all the conductors can solve the static charge problems. But for non-conductors or insulation of equipment and materials in electronics industry, static charge cannot be solved only using grounding. Then one has to consider the use of anti-static materials, or use Ionizers to dissipative static charge or to reduce to neutral charge level. Two types of Ionizers have to be separately studied for their performance of in static discharge. These two types are namely the Overhead and the Pulsed DC Emitter, commonly used in electronics industry. Laboratory tests are conducted according to ANSI ESD STM3.1-2000 standard test method. A standard test instrument Charge Plant Monitor (CPM) is used study the performance of the effective static charge diffusion. Different heights and velocities are tested for the performance of Ionizers. The research revealed that Overhead Ionizer got remarkable effect at the maximum velocity where Ionizer almost got the same discharge time with effective area below the plane of 30 cm and directly down point but we got the same discharge time with the same effective area on the plane of 90 to 120 cm where its effective area is about 1.8m(W) × 1.2m(D). Apart from above, Pulsed DC Emitter Ionizer got almost the same effective area with the same discharge time below its 90 to 120 cm where its positive and negative ions encompass area around 1.2m(W) × 1.8m(D).