Thermo Scientific™ SURF-CAL™ Particle Size Standards Available on GSA/VA Contract for Federal Government customers only.

Simplify the preparation of calibration wafers with these particle size standards.

Manufacturer: Thermo Scientific™ PD305

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Catalog No. 09-980-168

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    Type Size Standard Particles
    For Use With (Application) SSIS Calibration and Maintenance
    Diameter (Metric) 0.304μm
    Description Particles for calibration and maintenance of Scanning Surface Inspection Systems (SSIS)
    Diameter (Metric) Particle 0.304µm
    Includes Certificate of Calibration and Traceability to NIST
    Material Polystyrene,Polystyrene
    Refractive Index 1.59 at 589nm (25°C)
    Size Distribution 0.004µm
    Stability Product stable for a minimum of 12 months
    Composition Polystyrene
    Additive None
    Particle Density 1.05g/cm³
    Quantity 50mL
    Storage Requirements Unless otherwise stated, refrigerate (2° to 8°C) product when not in use but do not freeze. Store upright and keep bottle tightly sealed. Mix product with gentle inversion by hand or vortex mixer.
    Concentration 3 x 108 particles/mL
    Contents Polystyrene microspheres in deionized, filtered water

    Simplify the preparation of calibration wafers with Thermo Scientific™ SURF-CAL™ Particle Size Standards, for calibration and maintenance of Scanning Surface Inspection Systems (SSIS). Available particle sizes correspond to the calibration point sizes required by instrument manufacturers.

    Thermo Fisher Scientific™, along with the Semiconductor Industry and SEMI, have established specific particle sizes to be used when calibrating Scanning Surface Inspection Systems. Working with instrument manufacturers, we created the SURF-CAL™ product line to meet SEMI standard guidelines.

    • Available sizes are considered to be critical sizing nodes as defined by the International Technology Roadmap for Semiconductors (ITRS).
    • By depositing SURF-CAL™ NIST™ traceable polystyrene latex spheres (PSL) on specially selected wafers, you can perform periodic calibration checks and compare your scanner with scanners at other locations.
    • You can also assess the performance of your SSIS at critical stages in the manufacturing process.
    • All products are suspended in deionized, filtered water in 50mL bottles at a concentration of 3 x 108 particles per mL.


    Products PD1100 and smaller are also available at 1010 particles per mL for applications using the aid of a Differential Mobility Analyzer (DMA) or other size exclusionary techniques.

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