From this updated post its evident that the O2 RTP treated samples start discoloring after ~10 days. Also, the O3 + O2 RTP treatment is probably better in preventing dicoloration than just O2 RTP. So amongst all the samples, the…
Category: NRG
Track-Etched Membrane Update
This morning I did a little work with the track etched membranes (0.05um 13mm). I talked with Paul over in Hopeman and he is currently working on making a small coring tool to cut out the membranes (it should be…
Posted in NRG
15nm oxide influence on air permeability
The graph below is air permeabilities for four samples from wafers 344,338,342,345 without and with 15 nm thick deposited oxide on the front side. All of this samples don’t have pinholes.Look at the data for samples 2 and 4 on…
Posted in NRG
SiO2 coated membranes
The SiO2 coated samples (from W335 & W341) were found completely discolored after 5 days in DMEM (benchtop). Thus, silicon dioxide coating didn’t prevent discoloration as much as the RTP treatment. There’s a need to check the discoloration profile of…
Posted in NRG
Oxygen RTP better than Argon RTP
In continuation of the previous post, its been further observed that O2 RTP treated samples remain unchanged whereas the Ar RTP treated samples started to discolor after a week, as shown in the following images: In order (left to right)1.…
Posted in NRG
Track-Etched Membranes
I briefly experimented with the track-etched membranes this morning and found that they are extremely fragile and near impossible to cut. I disassembled a few of the microcons and found that a circular piece of paper the size of a…
Posted in NRG
Low Pressure Permeability
I retested the 100K Microcon, 100K Nanosep, and 300K Nanosep membranes at 1000RPM, which in the clinical centrifuge is 4.33psi by my calculations. I retested the 100K Nanosep just to make sure that we had some solid permeability values. I…
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Air tests on wafers with deposited oxide and Burst pressures for w407-413
I tested those membranes from w335 and w341 with approximately 40 nm of deposited oxide on both sides for air permeability and burst pressures. There was tiny amount of air flow (I checked for leak) from few of them which…
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TEM on SiO2 coated membranes
As per Jim’s suggestion, I coated wafers 335 and 341 with 40.6nm SiO2 on top and 42nm SiO2 at backside. The membrane cells have been passed to Anant and Maryna for chemical stability and air flow tests. Today I got…
Posted in NRG
