DocumentCode :
3501642
Title :
Experiments of adhesive distribution based on two-phase flow dispensing technology
Author :
Guiren Huang ; Jinsong Zhang ; Jianhua Zhang
Author_Institution :
Sch. of Mechatron. Eng. & Autom., Shanghai Univ., Shanghai, China
fYear :
2012
fDate :
13-16 Aug. 2012
Firstpage :
142
Lastpage :
146
Abstract :
This paper presented a novel approach based on the two-phase flow dynamics to dispense the liquid with a high consistency and accuracy. The new technology adopted the direct driving principle to induce the stable pattern of slug flow formation separating the bubble and droplet uniformly and individually in the micro-channel. In the experiments, the gas and liquid streams entered the mixing chamber in the same time with a flow rate of Qgas=~300 ml/min and Qliquid=1-3 ml/min. A gas-liquid two-phase flow had been formed stably in the mixing chamber to spray droplets out of the nozzle. The results revealed that decreasing the distance between the gas needle terminal and the nozzle orifice had increased the dispensing frequency and decreased the droplet mass, volume and diameter under the same parameters of gas flow rate, liquid flow rate, diameter of nozzle hole and diameter of gas needle. Increasing the liquid flow rate could increase the frequency of droplet dispensing. The lower mass of droplet was related to the higher frequency of droplet dispensing. The minimum volume, mass and diameter of droplet were 101 nl, 105 μg, 578 μm respectively with the frequency of 54.6 Hz.
Keywords :
bubbles; drops; electronics packaging; microchannel flow; nozzles; orifices (mechanical); two-phase flow; adhesive distribution; bubble; droplet; frequency 54.6 Hz; gas needle terminal; gas stream; gas-liquid two-phase flow; liquid stream; mass 105 mug; microchannel; mixing chamber; nozzle orifice; size 578 mum; slug flow formation; two-phase flow dispensing technology; Electronics packaging; Fluid flow; Liquids; Needles; Orifices; Packaging; Substrates; adhesive; dispensing technology; two-phase flow;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronic Packaging Technology and High Density Packaging (ICEPT-HDP), 2012 13th International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4673-1682-8
Electronic_ISBN :
978-1-4673-1680-4
Type :
conf
DOI :
10.1109/ICEPT-HDP.2012.6474587
Filename :
6474587
Link To Document :
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