Process Summary for the week of 12/3 -12/10/2007: Simpore Process Flow.xls JP

I reran a set of hydraulic permeability tests at 16.56psi (3500RPM) hoping that this would clarify the previously collected data at the 21.63psi (4000RPM) and the 33.79psi (5000RPM) range that did not seem to agree with the trend of the…

We have previously discussed how the membranes near the center of the wafer have very small pores, while as you progress outward larger pores begin to appear. I tested one of these central membranes from wafer 304 (TEM sample, position…

I took a closer look at some of Lingyun’s samples today, and captured some interesting TEM images. wafer 205 with 10 nm Ti @ 35kx wafer 205 with 10nm Ti @ 250kx wafer 205 with 10nm Ti & 10nm Au…

Surface functionalization results

The graph below shows the burst pressures for302, 303, 304, 307 wafers.

The objective of last week’s production was to track down the source of Cu contamination. The good news is that none of the wafers showed signs of Cu. The bad news is we are not sure why it has disappeared…

UPDATED 12/12/07 – Added data on albumin. In these gels, the band from beta-galactosidase appears to overlap with phosphorylase b making it difficult to determine which protein passes and which is retained. I have used Mike Bindschadler’s pore imaging software…

Here is a slightly enhanced version of Mike’s latest hydraulic permeability data for commercial devices with PES membranes. The data at 22 and/or 34 PSI are a bit strange. Still the long-term trend seems downward. Similar data for PNC-Si membranes…

Just some quick thoughts about the attached excel on my previous post… The 100K nanosep does not have a hydraulic permeability value at 194.65psi because it passed all 500uL of water through in 1minute which is the smallest interval of…