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HT Foil Flexible Heaters

HT Foil Flexible Heaters

Product Overview

This high temperature etched foil heater from Watlow is designed for demanding applications requiring operating temperatures up to 1100°F (595°C). The heater, only 0.030 inch (0.76 mm) thick, is insulated with a mica sheet.

More Information

​The HT Foil Flexible Heater is fairly rigid and must be securely and uniformly clamped from both sides for support and good heat transfer during operation. ​

Performance Capabilities

  • Operating temperatures to 1100°F (595°C)
  • Watt densities to 110 W/in 2 (17 W/cm 2 ) when operating at 500°F (260°C). Watt density should decrease as temperature increases.

Feature and Benefits

  • High temperatures and watt densities for more demanding applications. 
  • Fast heat-up due to thin construction and low mass design.
  • Easy to design in circular or complex two-dimensional shapes.
  • More uniform part temperatures are possible with etched foil zoned heating.

Applications

  • Semiconductor industry: wafer processing equipment
  • ​High temperature platens for laminating presses

Applications and Technical Data

Installation and Mounting
The HT Foil heater is designed to be permanently clamped. If the lead connection points are within the clamped area, a relief in one of the clamped surfaces is required to allow adequate clamping of the active heater area.

General Specifications
Although Watlow doesn't stock HT Foil heaters, there are several specifications common to most of the custom designs. They include:

  • Thickness over heated area: 0.030 inch (0.76 mm) 
  • Thickness over lead connection area: 0.200 inch (5 mm) 
  • Dielectric strength--volts ac, minimum: 1000V Å (ac)
  • Maximum operating temperature: 1100°F (593°C) 
  • Maximum allowable watt density at various temperatures:
    • 1000°F (540°C) 20 W/in 2 (3.1 W/cm 2 )
    • 900°F (480°C) 40 W/in 2 (6.2 W/cm 2 )
    • 800°F (425°C) 60 W/in 2 (9.3 W/cm 2 )
    • 700°F (370°C) 75 W/in 2 (11.6 W/cm 2 )
    • 600°F (315°C) 90 W/in 2 (14 W/cm 2 )
    • 500°F (260°C) 110 W/in 2 (17 W/cm 2 )
  • Lead wire--Type MGT 600 volt with Nickel clad Cu conductor: 840°F (450°C)

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