Assessing the surface modification of NPN chip using XPS

Wafer 1148 was produced roughly around the same time that the wafer I used to make my oldest MgF2 material (wafer 1085) was produced. We know that some of the NPN material from that time was not etched all the way through, creating pores that look like a ‘bowl-with-hole’. I believe the shape of the…

I believe that we can use MgF2 nanomembranes as electroosmotic pumps, along the same lines as pnc-Si and NPN materials. To first get a sense of how much pumping I would expect, I wanted to know what the zeta potential of these membranes would be, as the potential is directly proportional to the amount of…

“Three ways to build an artificial kidney” This IEEE Spectrum article list three efforts to make an artificial Kidney. The first is the AWAK, kidney on a belt. They don’t have the latest images for this, only the original very bulky design. The second is the Roy/Fissell implantable Renal Assist Device (iRAD). Both of these…

I used the following parameters in the Simple Sieving Model (pardon the MATLAB syntax) Am = 1; %cross sectional area in cm^2 Do = 1*10^-7;% diffusion coefficient in the membrane in cm^2/sec P = .15;% membrane porosity; t = linspace(0,420,500); %time vector sec Qo = 1*0.00166; %militers per second (0.00166 = 10 ul/min) L =…

We have a wafer that did not clear 500 nm pores (400 nm thick silicon nitride, #4682). There are about 230 chips that could be useful if they were etched a little. I used a SF6 based recipe (15 sccms O2, 30 sccms SF6, 10 sccms CHF3, 110/10 W FWD/REF power, 5e-5 torr base pressure,…

I attended the 2014 Gordon Research Conference (GRC) on Fuel Cells in August. For those of you not familiar with Gordon conferences, I will make a plug for them as a great venue for learning much detail and interacting closely with many of the major contributors in a specific field. GRC has a wide variety…