Ppt Determination

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• Micro: Implementing enhanced ICP-MS technology to attain SEMI Grade 5 purity levels
  trace-element determinations in high-purity chemicals. It has been used successfully to determine impurities at the 100-ppt (Grade 4) level in hydrogen peroxide using SEMI methodology. Unfortunately, it does not have the capability to detect all 21 trace metals specified at the proposed H purity level of 10...
• MICRO: Critical Materials
  interferences, including 40Ar on the determination of 40Ca and 38ArH on the determination of 39K. For those elements, detection limits are <0.5 ppt. Another benefit of DRC technology is that it uses a high-temperature plasma. Unlike a cool plasma, a high-temperature plasma can determine elements with high...
• MICRO:June 98:Semicon West Exhibitors - page 2
  .....14124-1 IDS Software Systems.....14236 Lambda Technologies .....14520 Longhill Industries .....14315 Manufacturing Technology.....14237 Mitsubishi Electric Automation.....14129 MPM.....14306-4 MV Technical Sales.....14124 Noran Instruments.....14336 NRD.....14436 Polaroid.....14402 PPT...
• Using VPD ICP-MS to monitor trace metals on unpatterned wafer surfaces
  , a significant advantage for semiconductor applications with sample size limitations. Element % RSD 27Al 4.3 39K 3.5 56Fe 1.6 59Co 2.1 184W 1.7 Table IV: Short-term precision of three replicates per determination for 100 ppt of some selected elements. The wafers submitted for analysis by VPD...
• Spotlight
  of dispersing cohesive fine powders down to submicron sizes. Gas analyzer An on-line gas analyzer from Controle Analytique has three ranges: 0 50 ppb, 0 500 ppb, and 0 5 ppm. Displayed resolution is 10 ppt. The unit is used for N2 determination and end-of-life gas purifier monitoring...
• Using an in-line monitor to obtain real-time moisture measurements (First of two parts)
  YesNoNo No Response time 1 minute to ppb levels80% of value in10 minutes at10 ppb80% of finalvalue in 1 hourto 5 ppb Immediate Limit ofdetection Single-digit ppb Single-digit ppb Single-digit ppb Sub-ppb Accuracy +-5 ppb+-10 ppb+-5 ppb +-10 ppt Approximateprice <$10,000$27,800$21,000 $100,000to...
• Evaluating reusable HDPE containers for delivery of high-purity hydrofluoric acid
  for the study. All drums were manufactured from unpigmented HDPE. They were filled with 49% hydrofluoric acid (by weight), which contained <500 ppt of any single metallic impurity. The acid was passed through 0.1-um filtration prior to entering the container. The containers were filled as received from...

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