Hydrophobic Web

Conduct Research

• Using VPD ICP-MS to monitor trace metals on unpatterned wafer surfaces
  results in the decomposition of the oxide into HF/H O droplets that contain the metallic contaminants, which are then distributed across the wafer's remaining hydrophobic surface. A small amount of ultra-high-purity scanning collection solution (SCS) is then used to accumulate all the droplets into one...
• Optimized deaeration
  / gas contents are the need for higher pump capacity, deposits in the wire, press and dryer sections, increased foaming, accumulation of hydrophobic substances (localized dirt islands), web breaks originating from floated resinous and sticky substances, and poor drainage on the wire. Paper quality...
• MICRO: Wet Surface Technology
  such as vias, contacts, deep trenches, and poly-Si features, where water spots form easily at hydrophilic/hydrophobic interfaces. Spots that are large enough to overlap more than one die will result in a definite yield loss, and even smaller water spots can cause killer defects, high leakage currents...
• Characterizing organic impurities in semiconductor-grade hydrogen peroxide
  components, in particular hydrophobic organic components, are assumed to have adverse effects on yield, but systematic investigations on this subject have not yet been published. In one experimental study, a "special quality" hydrogen peroxide with a TOC content of <3 ppm was used, and no detrimental...
• MICRO: Ultrapure Fluids by Anurag Kumar (Jan 2000)
  Anurag Kumar and Mark J. Camenzind, Organic contamination deposited on wafer surfaces from ultrapure water (UPW) can seriously undermine wafer-cleaning efficiency, which leads to nonuniform etching. In addition, carbon-rich hydrophobic wafer surfaces are known to affect gate-oxide growth rates...
• Separations Anxieties
  The majority of reversed-phase HPLC columns use a ?silyl ether? (Si-O-Si-) linkage to attach the bonded phase to the underlying silica. That Si-O-Si bond is subject to acid-catalyzed hydrolysis (the stoichiometry even works out: Si-O-Si + H2O --> SiOH + SiOH). The hydrophobic bonded phase shields...
• Tuning in to New Solvents
  ) that enhance the solubility of very nonpolar organic compounds in aqueous enzymatic systems [5]. After the reaction has been performed in this mixed solvent, the application of moderate CO pressures (~10-20 bar) induces the separation of the organic co-solvent, now containing the hydrophobic product, from...
• Tuning in to New Solvents
  perform difficult transformations on highly hydrophobic substrates. Other opportunities exist in homogeneous catalysis, where tunable solvents could be used to remove and recover metal catalysts. The following section will discuss each of these subjects in more detail. Near-critical Water (NCW...
• Controlled Release Moves Beyond Patent Extension
  with hydrophilic surfaces and hydrophobic interiors that can carry insoluble pharmaceuticals. PR Pharmaceuticals (Fort Collins, Colo.) combines PEGylation with more traditional CR microencapsulation to achieve sustained release plus controlled bioavailability. The company s InsuLAR injected CR insulin product...
• Assure Batch Uniformity for Freeze-Dried Products
  degradation of the API alter the desired secondary, tertiary or quaternary structure of a peptide or protein product allow polymerization, aggregation or denaturation of active ingredients that have both hydrophilic and hydrophobic character. For biopharmaceuticals, conformational changes should...

Engineering Web Search: Hydrophobic Web