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AGC EN-A1 Alkali Free Boro-Aluminosilicate Glass

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Abrisa Technologies offers Asahi Glass Corporation (AGC) EN-A 1 material, a highly transmissive, alkali-free thin boro-aluminosilicate glass that is ideal for highly sensitive bio-photo detection applications, high through­put sensor applications and as enhancement glass for thin displays and cover glass for micro arrays.


Its coefficient of thermal expansion (CTE) of 38 x 10-7 is well matched to silicon, making it an ideal and economi­cal choice for use as a glass polishing substrate for the thinning process (back grinding) of semiconductor chips supporting low profile electronic device manufacture.


Key Features:

  • Alkali-free
  • CTE well matched to silicon
  • Standard thicknesses 0.3, 0.5, 0.7mm
  • Sizes up to 25″ x 20″ (635mm x 508mm)
  • High Transmittance from 400 – 2300nm
  • Good chemical resistance
  • Low fluorescense at genomic excitation wavelengths


  • Image sensor windows
  • Cover glass for micro arrays
  • Display enhancement glass
  • Biosensors
  • Glass for semiconductor thinning
  • Low weight, reduced profile designs

Similar CTE trend as silicon


Mechanical Properties
Density g/cm3 2.51
Young’s Modulus GPa 77
Poisson’s Ratio   0.22
Thermal Properties    
CTE (Thermal Expansion) (50-250°C) x 10-7 / °C 38
Glass Transformation Point °C 720
Strain/Softening Point °C 950
Optical Properties    
Refractive Index Nd 1.52
Electrical Properties    
BulkNolume Resistivity Log (Ω • cm) 13.6
Dielectric Constant At 0.001 GHz RT 5.5
  At 10 GHz RT 5.5
Dissipation Factor At 0.001 GHz RT 0.002
  At 10 GHz RT 0.006
Chemical Properties    
Acid Resistance
(HF 5% at 25°C, 20 min.)
Mg/cm2 3.1


Transmission Curves

UV to Blue Transmission


Primary Transmission Range


NIR - MWIR Transmission




  • Custom V-Coat, Multi-band, Broadband AR
  • AR Coatings to MIL-C-14806 A
  • ITO/IMITO for EMI Shielding, Heater, LC Devices
  • Custom SWP, LWP, Bandpass, UV & NIR Blocker
  • Broad/Narrowband Scanning Mirror Coatings
  • Deposition onto Filters, Silicon & Other Materials
  • Autoclavable, Bio or Chemically Compatible


  • Fabrication to Shape & Size
  • Cut & Seam or Circle Ground to Size & Shape
  • Precision CNC – Holes, Bevels, Steps, Notches
  • Damage Resistant Substrates
  • HIE™ Aluminosilicates
  • AGC Dragontrail™
  • Corning® Gorilla®
  • SCHOTT AS 87
  • Chemically Strengthened Soda Lime Float
  • Low Expansion Chemically Resistant Substrates
  • SCHOTT Borofloat® 33
  • Ultra Thin and Wafer Substrates
  • AGC EN-A1
  • Corning® 0211 & Eagle XG®
  • SCHOTT AF32, D263® & AS 87
  • Other
  • Applied Films & Tints
  • GasketApplication
  • Edge Treatment/Blackening

Easy-to-Clean & Anti-Fog Solutions:

  • Fabrication to Shape & Size
  • Oleo/Hydrophobic Options
  • ITO Heater, HT AF Anti-Fog Solutions

Graphics & Bus Bars:

  • Fabrication to Shape & Size
  • Color Matched Epoxy Ink
  • Non-Conductive Ink
  • High Temperature Frit Ink
  • Deadfront Ink – Partially Transmissive
  • Infrared IR Transmitting Ink
  • Silver Epoxy, Silver Frit, CrNiAu Bus Bars


Abrisa Technologies is a recognized global supplier of high quality, fabricated glass components, optical thin film coatings, and custom glass solutions for a wide variety of industries.


Our US based Abrisa Industrial Glass fabrication facility in Santa Paula, CA and our ZC&R Coatings for Optics facility in Torrance, CA serve diverse industries such as microelectronics and displays, semiconductor, military, automotive, aerospace, medical, biomedical and scientific R&D.


We provide custom specialty flat glass and coating products for applications such as: flat panel display, touch and gesture recognition; visible to IR imaging and surveillance; entertainment, indoor and outdoor lighting; advanced instrumentation; and photonics.


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