Vapor based PEG deposition

I recently presented an update at the HCIC User meeting on 11/10/23 detailing our efforts in exploring the use of optical tweezers to perform microrheology in type I/type III collagen hydrogels. These hydrogels are of interest for in vitro models such as the hToC and we would like to explore the viscoelastic changes caused by…

Based on previous data, we have seen a reduction in pore size and porosity when we increase the oxide thickness. For this experiment, we compare asymmetrical oxide thicknesses with symmetrical oxide thicknesses to observe which layer has the dominate effect on pore size and porosity. Wafer 718 is a 40/15/40, 719 is a 20/15/20 and…

Last fall we decided to try to integrate a filter immediately upstream of Vincent Tabard-Cossa’s nanopore DNA sensors. The idea is to assemble back-to-back a NPN membrane a standard nitride membrane used in Vincent’s nanopore fabrication system an oxide spacer. Currently the lifetime of these sensors/sequencers is limited by clogging events. The purpose of our…

The Ozone generator works very nicely. Dave is going to be providing an in-depth user manual for us, so I’ll be somewhat brief. In this first picture, I compare an ozone treated sample against a control. Both ‘droplets’ are 3uL of DI water. The treatment protocol:– 3 min of O2 at to fill main chamber,…

Purpose: We want to know the effects of the RTP process on pore size, pore density for the biased films coming out of the AJA. I believe that the RTP ramp rate is important for forming bigger pores. Some work (Joe Qi Thesis) has indicated that the pores come out more circular as the wafer is…

Last week we attempted to mimic our standard CVC recipe in the AJA system (15 nm Si, 450 C deposition temp, 1000 C RTP).  I should note that the protective oxide thickness in the AJA membrane was 20 nm (not 40 nm as it was in the CVC).  Below are two images comparing the AJA…