Study on the prediction method of ultra-micro adhesive transfer ratio based on controlling the change of physical parameters

Abstract

Nowadays, there has been some development in micro/nano manufacturing technology, but many micro/nano components have not yet been applied as products in practice. This is because the application of ultra-micro encapsulation technology in the micro/nano field is one of the main obstacles. Ultra-micro encapsulation needs to reach the nL (10-9L) level. However, there are some problems with methods that can achieve nL-level encapsulation currently, such as the amount of adhesive output is uneven and uncontrollable. Therefore, this article proposes an ultra-micro dispensing method based on the principle of liquid transfer, which achieves adhesive transfer at the pL (10-12L) level. A way to ascertain the liquid’s transfer state based on the transfer ratio is proposed in response to the difficulty in determining the stretching speed when changes in the transfer state at the pL level. The roles of Ca, receding contact angle, and initial distance in various transfer states were investigated, and a prediction formula for the transfer ratio was derived based on the influence of three physical parameters on the transfer ratio. Verification has confirmed that the discrepancy between the predicted transfer ratio and the actual transfer ratio doesn’t surpass 3%.