Coating Portfolio & Spectral Specifications

Nanofilm provides a comprehensive range of metallic coatings, specifically engineered to achieve precise reflectivity, optical density, and spectral performance. Our coatings are verified via advanced metrology to ensure consistent behavior across your specific operational wavelengths.

Standard Chromium Coatings

Classified by Reflective Performance at 436 nm (G-Line).

Our standard range of chromium films is optimized for high-contrast lithography, providing stable optical density and superior surface durability.

LRC (Low Reflective Chrome)

  • Reflectivity: ≤13% (@ 436 nm)
  • Optical Density: 2.8±0.2
  • Application: High-contrast photomasks; minimized internal reflections.

Figure 1 & 2: LRC Spectral Reflectance and Film Thickness analysis.

MRC (Medium Reflective Chrome)

  • Reflectivity: 33%±3% (@ 436 nm)
  • Optical Density: 2.8±0.2
  • Application: Balanced reflectivity for specialized imaging and alignment.

Figure 3 & 4: MRC Spectral Reflectance and Film Thickness analysis.

HRC (High Reflective Chrome)

  • Reflectivity: ≤65% (@ 436 nm)
  • Application: Front-surface mirrors and high-visibility calibration targets.

Figure 5 & 6: HRC Spectral Reflectance and Film Thickness analysis.

BRC (Blue Reflective Chrome)

  • Optical Density: 3.0±0.2
  • Application: Specialized high-density applications requiring blue-spectrum tuning.

Figure 7 & 8: BRC Spectral Reflectance and Film Thickness analysis.

Multi-Layer & High-Density Coatings (Non-Standard)

Engineered for Extreme Contrast and Specialized Spectral Response.

For projects requiring enhanced opacity or unique spectral signatures, we offer multi-layer deposition sequences. These configurations are designed for mission-critical applications where an Optical Density (OD) of 5.0 is required.

BCB (Blue/Chrome/Blue)

A triple-layer sequence optimized for maximum absorption and a neutral spectral footprint.

  • Typical Density: 5.0
  • Deposition Sequence: Blue Reflective / Chromium / Blue Reflective

Figure 9 & 10: BCB Triple-Layer Spectral Reflectance and Thickness analysis.

Additional Hybrid Metallization

The following specialized sequences are available for IR-heavy environments or conductive requirements. (Full spectral data available upon request):

  • GO/CR/GO (Gold/Chrome/Gold): Top surface 11% reflectivity @ 436 nm. Density: 5.0.
  • GO/CR/BL (Gold/Chrome/Blue): High-density hybrid for specialized sensing. Density: 5.0.
  • BL/CR/GO (Blue/Chrome/Gold): Density: 5.0.

Technical Documentation & Metrology

Every coated substrate is accompanied by a comprehensive metrology report. Utilizing non-contact spectral reflectance tools, we verify absolute opacity and uniformity across the clear aperture.

Metallization-Specification Thin-FilmTransmission-Allowances