Technology of micromatrix posts applied to elimination of initial filling and Newton ring in a microcapillary pumped loop

A microcapillary pumped loop (MCPL) utilizing a two-phase heat transport has been investigated extensively because of its high heat transmission ability. Although the MCPL has been started up suc- cessfully, the initial amount of working liquid required to fill the system is so hard to control that the repeat operation of MCPL is not easy to ini- tiate. In addition, the issue of Newton ring often occurs in the thermal bond- ing process of the chip and even causes the device to crack. An innovative method of micromatrix posts is proposed and confirmed by experiment for eliminating the initial filling and Newton's ringeffectively. This proposed method will be useful in the operation of MCPL and all thermal bonding of microchips. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. (DOI: 10.1117/1.JMM.12 .3.033007)