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Effect of Conduction pre-heating in Au-Al Thermosonic Wire Bonding

Journal of Surface Engineered Materials and Advanced Technology 2011年第3期1卷 121-124页

作者： Gurbinder Singh Othman Mamat 不详

This paper presents the recent study by investigating the vital responses of wire bonding with the application of conduction pre-heating. It is observed through literature reviews that, the effect of pre-heating has not been completely explored to enable the successful application of pre-heating during wire bonding. The aim of wire bonding is to form quality and reliable solid-state bonds to interconnect metals such as gold wires to metalized pads deposited on silicon integrated circuits. Typically, there are 3 main wire bonding techniques applied in the industry;Thermo-compression, Ultrasonic and Thermosonic. This experiment utilizes the most common and widely used platform which is thermosonic bonding. This technique is explored with the application of conduction pre-heating along with heat on the bonding site, ultrasonic energy and force on an Au-Al system. Sixteen groups of bonding conditions which include eight hundred data points of shear strength at various temperature settings were compared to establish the relationship between bonding strength and the application of conduction pre-heating. The results of this study will clearly indicate the effects of applied conduction pre-heating towards bonding strength which may further produce a robust wire bonding system.

关键词： Conduction pre-heating Intermetallic Coverage Shear Strength Thermosonic Wire Bonding

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Implementation of pre-heating System in Stenters for Improving Machine Performance and Increasing Efficiency

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Journal of Textile Science and Technology 2021年第4期7卷 143-151页

作者： Sk. Mohammad Raafi Ummul Khair Fatema Department of Wet Process Engineering Bangladesh University of Textiles Dhaka Bangladesh Department of Environmental Science and Engineering Bangladesh University of Textiles Dhaka Bangladesh

In textile finishing, stenters always draw considerable attention to newer inventions to boost up production via maximum utilization of energy. Prior to main drying or heat-setting chambers, intermediate heating of cylindrical system especially by steam has a direct blessing to moisture evaporation, processing speed, fabric quality and so on. Based on actual operational data, this study reveals the outcomes of a pre-heating module installed within a stenter. After employing the pre-heating system to knit fabrics of different structures and compositions, 23% - 61% moisture reduction was found and the speed of processing fabrics was increased simultaneously by 17% - 30% without any compromise on fabric quality. Moreover, no less than 8.21% savings in annual electricity consumption were observed.

关键词： Stenter pre-heating Machine Performance Fabric Processing Speed Energy Savings

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Effect of pre-heating on Wool Fabric via Corona Discharge

Effect of Pre-heating on Wool Fabric via Corona Discharge

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先进纺织材料及加工技术国际学术会议

作者： Genyang Cao Weigang Cui Guocheng Zhu Pibo Ma Weilin Xu (Ministry of Education Key Laboratory of New Textile Materials Green Processing and Functioning Wuhan University of Science and Engineering Wuhan 430073 China)

Corona discharge is a popular technology which is mainly applied in modifying the surface of material. In this paper, the pre-heating process was augmented before corona discharge, which mainly improved the efficiency of corona discharge. The surface hydrophilic properties of wool fabric, with and without pre-heating, which were treated with the same corona discharge, were different and the former was better. Enhancing the pre-heating temperature and corona discharge voltage can increase the hydrophilic properties but the high temperature make fabric yellow. Corona discharge combined with pre-heating treatment can get good hydrophilic effect and the water absorption time was less than 1 second. But the thicker one should increase voltage and temperature, and then the water absorption time can be less than 1 second.

关键词： Wool fabric Corona discharge pre-heating Thickness

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