Clearview Transparent Heater

 

The Clearview Transparent heater allows continuous high definition operation of device monitors in low temperature environments. Optically clear heaters are typically used in applications that require a high degree of light transmission.

Specifications

  • Highest light transmission 1 (1; -90% (ref. ITO 1(1, 70-80)))
  • Virtually no physical size limitation.
  • Ultra-fine wire (.0009 dia.) and thin laminated construction (.006-.010 thick).
  • Lead configurations include: PCB pins, crimp terminals, solder tabs. 20-30 gauge TFE leads.
  • 3D formed shapes to fit geometric objects.
  • Integrated transparent RTD temperature sensors available
  • Removable liner adhesive system available.
  • Broad design resistance range (various alloy resistivity)
    (more design flexibility vs. ITO)
  • Manufactured in class 10,000 clean room

Full product specifications available in datasheet linked above.

Applications

Optically clear heaters are ideal for applications that require a high degree of light transmission, such as LCD screens, touch screens, hand held scanners and imagers.

  • Aviation and aerospace
  • Security apparatus
  • Satellites and telecom
  • Industrial applications
  • Refrigeration

Overview

Clearview transparent heating elements are an optically clear variation of our wire-wound heater that provides superior light transfer with higher durability than comparable technologies. 

The wire-wound design brings high heating efficiency and quick thermal response with minimal power consumption. This makes Clearview ideal for applications such as computers, battery powered hand scanners, and touch screens.

Optically clear heaters are typically used in applications that require a high degree of light transmission. Clearview's ultra-fine wire construction gives high optical clarity and ensures optimal light transmission for scanning and imaging applications.

Clearview provides controlled, direct heat to displays, lenses and clear panels, allowing continuous high definition operation of device monitors in low temperature environments. Displays and touch screens remain usable in cold, high humidity/low dew point environments and locations where ambient temperature can change quickly.

Engineering services and consultation are available on every custom heating element order. Contact a specialist today for details.

 

 

 

 

Practical product(一)

winter service vehicle

Practical product(二)

Technical data of transparent film heater for helmet

 

Transparent heater with capacitive controls on a sigle film ,please download Technical data

Abstract

We demonstrate a new concept for the fabrication of flexible transparent thin film heaters based on silver nanowires. Thanks to the intrinsic properties of random networks of metallic nanowires, it is possible to combine bendability, transparency and high heating performances at low voltage, typically below 12 V which is of interest for many applications. This is currently not possible with transparent conductive oxide technologies, and it compares well with similar devices fabricated with carbon nanotubes or graphene. We present experiments on glass and poly(ethylene naphthalate) (PEN) substrates (with thicknesses of 125 μm and extremely thin 1.3 μm) with excellent heating performances. We point out that the amount of silver necessary to realize the transparent heaters is very low and we also present preliminary results showing that this material can be efficiently used to fabricate photochromic displays. To our knowledge, this is the first report of metallic nanowire-based transparent thin film heaters. We think these results could be a useful approach for the engineering of highly flexible and transparent heaters which are not attainable by existing processes.

 SUBSTRATE SPECIFICATIONS:

  • Glass: Corning Eagle XG, Eagle 2000, Borafloat, Standard float (soda-lime)
  • Tempered Glass: Chemical or Heat Tempered
  • Thicknesses: 0.01" (0.25 mm) to 0.5" (12.7 mm) standard. 
    (For others, consult TFD)
    70 µm & 100 µm On Special Request

PRODUCT DIMENSIONS:

Sizes:

  • Plain Version: All from 1/2" sq or round, to 24” x 24" (610 mm x 610 mm)
  • Patterned: Sizes from 1/2" sq. to 14” x 18" (355 mm x 457 mm)
  • Custom: Many variations available: Circular domes, curved plates
    Wide variations on voltage and power are possible (consult TFD)

Tolerances for sizing: ± 0.002" (0.05 mm)

PROCESS:

  • ION BEAM SPUTTERING (SUPERIOR PROCESS)

CUSTOM POWER DISSIPATION:

  • Tested Power Rating: 0.05 to 20 watts /sq.in. (Configuration dependant)
  • Heating Uniformity: ± 5%

OPTICAL CHARACTERISTICS: (See Curves)

Heater Types Plain ITO IMITO™ IMITO™ Grid / Patterned
Transmissions* 75 – 85% 85 –- 94% * 90 – 98% IR 90%
Vs. Wavelength
*********** 400 – 700 nm ************
1 – 10 µm
Resistivity, nominal (ohms/sq.) 2 to 350 2 to 350 2 to 350 5 to 50
(* = ITO Thickness Dependent)

APPLICATIONS:

Commercial Displays, Avionics and Military Displays

COATING NON-UNIFORMITY:

± 2.5% across full sheet

BUSBARS:

Options:

  1. Sputtered Cr/Ni/Au, Solder reflow, 10K PSI (pull test)
  2. Flex Cable
  3. Wraparound (see diagram)

SURFACE QUALITY:

  • Defects: < 5 micron on large substrates
  • Imbedded Particle < 2 micron
  • Surface Roughness: < 20 Å RMS, for each side
  • Inspection Quality: 

    1. 80/50 to 20/10 (5K Lux)
    2. Thermal Imaging

DURABILITY:

  • Abrasion: 200 strokes @ 10Kgm (Mil C-675)
  • Adhesion: Snap Test (Mil M-13508)
  • Solubility: > 24 hours in Sodium Chloride, Fog and Solution (Mil C-675)
  • Temperature: > 12 hours @ -55 to 350°C

PACKAGING: CLASS 100, OR AS REQUIRED

OTHER MATERIAL RESISTIVITY TABLE:

 

Resistivity
(Ohm – Cmm)

Thickness
Å
TCR 
Thermal Coefficient Of Resistivity
General Nature
      ppm@25˚C  
ITO
Transparent
1.5x10 -4 1500 Å 1500+200 Transparent
SiOiCr 7.2x10 -4 1500 Å 100+25 Black
Inconel 4.5x10 -4 1500 Å *150+25 Metal (grid)
NiCr 3.5x10 -4 1500 Å *300+50 Metal (grid)
TaN 4.5x10 -4 1500 Å *100+50 Ceramic
AI
4.6x10 -6 1500 Å 450+50 Metal (grid)
Others Available Upon Request

RESIST EQUATIONS:

For the final manufacture of a heater, the resistance for the heater (ohms) is converted to resistivity (*ohms/sq.
This value is a function of the length of the heater (L) and the width (W) as it relates to the total resistance. L is the
size between bus bars.

 

BUS BAR COATINGS:

TFD offers several solutions of low profile, solid state and silver bus bars completely compatible for all solvents and pull tests of 8K gram/sq in.

A. Metalized Busbar. Cr / Ni / Au Solderable
B. Silver Epoxy
C. Copper Tape

Or Standalone

STANDALONE HEATERS, 10 OHMS/SQ IMITO™ (W BBAR ONE SIDE) ON TEMPERED FLOAT GLASS

RUGGEDIZED HEATERS, 15OHMS/SQ. IMITO™ FRONT SIDE (index matched back), LAMINATED TO LCD

CUSTOM HEATERS:

TFD offers complete design, specification and solution for your unique ruggedized heater application.