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  • Density Range
    Density range is the range of densities that a density or specific gravity instrument can measure. Density is expressed as mass per unit volume, and usually specified in kilograms per cubic meter (kg/^m). The density of water is 1000 kg/m^3 and snow density is usually measured as a ratio
  • IR, Nuclear and Beta Gauge Instruments
    IR, nuclear and beta gauge instruments use the absorption of radiation to measure the thickness or basis weight of webs, sheet materials or coatings. On nonmetallic materials such as paper or plastic films or webs, the amount of radiation is reflected back or transmitted through the material
  • Vortex Meters Tap the Motherlode
    The adage, "You can't control what you can't measure," is nowhere so true as in the process contra] industries. Going one step further, it is also necessary to ensure accuracy and repeatability in measurements. And, while you're at it, it is also nice if the measurement device is economical
  • MICRO: Defect/Yield Analysis & Metrology
    optoacoustic metrology instruments can be used to characterize all process stages: the technique can measure film-thickness uniformity before polishing, removal rates at intermediate stages, and the final thickness after polishing. The technology is also suitable for integrated measurement within the CMP
  • MICRO:New Technologies-Analysis & Metrology, by Patrick J. McCann, p.93 (July '99)
    molecular measurements can help increase yields. Instruments based on mid-IR laser technology are compatible with most semiconductor processing equipment. They can simultaneously measure multiple molecular compounds and perform reliable molecular measurements in corrosive environments. This article
  • MICRO: Behind the Mask -Chen (April 2000)
    patterned defect inspection system (KLA-Tencor, San Jose) running the advanced performance algorithm (APA). Both i-line and deep ultraviolet (DUV) Verithoro programmed defect masks from DuPont Photomasks were investigated. Although engineers have traditionally used shearing microscopes to measure

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