Micropatterned Filters

Our micropatterned optical filters combine patented microlithography expertise with state-of-the-art coating technology to enable smaller and simpler optical designs for portable or complex optical systems. This exclusive technology allows patterning multiple dielectric, metal, and color filter arrays on a single substrate.

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Standardized processes have been developed and are used today to manufacture these filter arrays in a new, world-class optical semiconductor waferfab designed explicitly for this purpose. The process is scalable to wafer-level glass or semiconductor volume production and supports millions of custom micropatterned optical devices delivered annually.

Torrent Photonics' patterned coatings are used to enhance performance in many biomedical, industrial, and aerospace OEM applications – enabling next-generation integrated optical devices that are more compact, robust, and cost-effective.

The equipment in our Class 100/1000 wafer fabrication cleanrooms have been selected and custom-designed for micropatterned coatings, enabling us to support ultra-small (μm) pixel-level features for imaging applications. We use the latest coating technology, including IAD evaporation, magnetron sputtering, and ion beam sputtering techniques.

Semiconductor-style mask aligners handle wafers up to 8 inches in the lithography fab.

Design & Materials

Custom Wavelength Bands | UV, VIS, NIR, SWIR
Dichroic | Bandpass, Short-Wave Pass, Long-Wave Pass, BBAR and More
Metallic | High Reflector, Dark Absorber, Apertures, Neutral Density and More
Sensors

Multispectral Sensing for Spectroscopy
Multispectral Imaging with Custom CCD and CMOS Sensors
Precision Reticles and Alignment Patterns
Patterned Pixels and Apertures
Focal Plane Arrays (FPA)
Variable/Gradient Filters

Patents cover our patterned optical filters in micro-patterning technologies (US patent 7648808) and pixel filter array on substrate (either on glass or directly on sensor/detector wafers) methodologies (US patent 6638668).

Non-Invasive Biomedical Imaging
Remote Sensing for Satellites, Defense, and Precision Agriculture
Industrial Quality Control Sensing and Imaging
Color Mixing for Entertainment Lighting
Light Intensity Control in Industrial Equipment
Sensing for Consumer Wearables
Integrated Custom Optics for Scientific Devices

Designed For Your Success

Our operations focus on supporting customers in developing their next-generation imaging and sensing equipment. With a toolbox of processes and technologies, we can quickly design the most effective way to develop products based on your application or product functionality. Our application engineers work with you to quickly assess your requirements and provide a proposal of technical feasibility.

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Substrate

Semiconductor wafers, optical-grade glass, fused silica, or other materials

Number of Bands

Number of filter bands combined on one substrate (multispectral sensing)

Filter Design Parameters

Transmission bands and blocking specifications

Feature Geometries

Smallest size and tolerance in position

Alignment

Alignment accuracies and available alignment markers

Handling, Testing, Packaging

Defined (e.g., ESD) handling, dicing, finishing, testing, and packaging

Commercial

Defense

Micropatterned Filters

Standard & Custom Micropatterning

Design & Materials

Optical Technology

Applications

Designed For Your Success

Design Parameters and Decisions Factors

Substrate

Number of Bands

Filter Design Parameters

Feature Geometries

Alignment

Handling, Testing, Packaging

Filter Types

Bayer Filters

Active Wafer Deposition

Mosaic Filters

Linear Variable Filters & LVBPF

Stripe Filters

Butcher Block Filters

Gradient Filters

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