Litho Black coating - Very low reflectivity & Extremely low outgassing - Acktar black coatings

Litho Black

Litho Black coated glass components
long metal sheet coated with litho black coating
IMG_0011_1
tiny litho black coating labels
Accurate Litho Black coating on glass slides
Accurate Litho Black coating

Litho-BlackTM coating is applied as a wafer level patternable light absorbing overcoat on wafers and serves to suppress stray light and optical cross-talk while accurately delineating detector element geometry.

  • Very low reflectivity
  • Tailorable electrical resistivity – conductor or insulator
  • Etching or lift-off compatible
  • 3 micron feature sizes
  • Virtually any substrate – silicon, glass, etc.
  • Extremely low outgassing
  • No particulation
  • Compatibility with lithographic process chemicals (details upon request)
  • Process temperature < 180 deg C
High Adhesion
Space Qualified
Low Reflection
Low Thickness
Temperature stability
REACH ROHS Compliant
Low Outgassing
Completely Inorganic

Specifications

Adhesion
metals, glass, ceramics, polymers
Adhesion test (ref ECSS-Q-ST-13C)
Coated pieces withstand scotch tape test (3M853 Crystal Clear tape, strength of 13N per 25mm), without any evidence of coating removal.
Outgassing CVCM (%)
0.001
Outgassing RML (%)
0.2
Coating chemical content
completely inorganic
Surface resistivity
≤2X10^6Ω/□
Material
metal
Cleanability
Coated pieces withstand cleaning with ethanol, IPA or acetone with no change in optical and technical characteristics. Magic Black™, Metal Velvet™ and Litho Black™ should be cleaned very gently." Magic Black™, Metal Velvet™ and Litho Black™ should be cleaned very gently.
Parts shape
3D
LIDT
NA
Humidity Resistance
MIL-C- 48497A
Certificates
ROHS, REACH, ISO 9001:2015, AS9100

Typical Properties

Litho black coating reflectance chart

 

Operational wavelengths
EUV-NIR
Coating thickness
0.8-5
NA Emissivity
(3-10µm)
Working temperature (°C)
-269 to 380 (°C)
Working temperature (°K)
4 to 653 (°K)
Weight of coating (mg/cm²)
0.3 - 1.1 (mg/cm²)
moderate Abrasion resistance
(ref MIL-C-48497A)

Additional Details

Litho-BlackTM  coating combines very high absorptance in the UV, VIS and IR wavelength bands and compatibility with photolithographic processing.

Composed exclusively of non-ferrous metals and non-ferrous metal oxides, Litho-BlackTM is completely inorganic and does do not incorporate any organic materials or other chemicals and no such materials are used in the generation of the coatings.

Applications:

1 – IR Pyroelectric Detector Array Wafers:

  • More IR absorbed
  • More heat into pyro-layer
  • Higher detector sensitivity

2 – 1024 Element Uncooled Linear Array Wafer:

  • Electrically insulating, low reflective coating covering the entire surface; leaving accurately sized windows over the elements
  • Generates uniform element width for uniform element response by covering spare edges.
  • Non-sensitive areas covered with low reflectivity coating for stray light suppression.
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