Yinxiao Li

4 Questions 4 Answers 0 Followers

Questions related from Yinxiao Li

How does surface tension / surface energy change for different variants of stainless steel?

There are many different variants of stainless steels, such as 304, 316, 409, 17-4 PH.... Do they all have the same surface tension and/or surface energy? I am trying to quantify the wettability...

11 April 2018 7,779 3 View

Why would water condense in a vacuum chamber when pressure suddenly drops?

In ESEM (environmental SEM), when we switch from rotary pump to turbo pump (which means pressure suddenly drops), water condensation on the sample is observed. Such condensed water should come...

11 August 2016 2,609 7 View

Any idea on PDMS-quartz bonding?

It is claimed everywhere that PDMS can be bonded with silica-based materials, such as glass, quartz, and PDMS. I have successfully done PDMS-glass bonding with the following steps: 1. Clean glass...

14 June 2016 3,007 3 View

How do I get straight PECVD SiO2 etching using RIE?

The purpose is to etch a straight trench of 1.8 microns on SiO2 surface. I would like to minimize the undercut. I read online that adding some Ar to SF6 would minimize the undercut (such as SF6...

25 March 2016 775 5 View