All Flex Provides High-Temperature Flexible Circuits for Extreme Environment Applications

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All Flex Solutions, a provider of flexible circuit technologies, rigid-flex circuits, heaters, and integrated assemblies for applications across medical, aerospace, industrial, and other high-reliability markets, offers HighTemp™ flexible circuits designed for applications requiring elevated thermal performance in environments such as aerospace, medical diagnostics, semiconductor processing, and down-hole drilling. The company developed the capability through specialized materials and fabrication processes aimed at supporting demanding operating conditions.

HighTemp™ Flex Circuit Capability

HighTemp™ flex circuits are available in double-sided and multilayer configurations and can be supplied alongside flexible heaters in Maxi-Flex® lengths of six feet or more. All Flex states that the capability was developed through testing multiple materials and processing options to improve performance in challenging environments.

Material Characteristics and Specifications

The circuits utilize high-temperature polyimide materials with insulation resistance ranging from 5000–6000 V/mil and resistance values up to 250 ohms per square inch.

Technical specifications include:

• Operating temperatures up to 250°C (482°F)
• Metal thickness: 0.0005"–0.0023"
• Total thickness: 0.0035"–0.010"
• Dielectric thickness: 0.05–0.20 mm
• Thermal conductivity: 1–12 W/m/K
• Resistance tolerance: ±10%
• Standard coverlay thicknesses: 0.001", 0.0015", 0.002", 0.003"
• Minimum bend radius: 0.30"
• Edge insulation: 0.030"
• Bond/peel strength: 101 oz/inch using PSA
• Lead options based on length, AWG, and coating requirements

The material system is described as having strong chemical resistance and controlled outgassing characteristics for aerospace applications.

Compliance and Target Applications

HighTemp™ flex circuits meet IPC-4204A/11 requirements, maintain RoHS compliance, and are UL rated to 94V-0 and 746F. All Flex identifies applications in down-hole oil drilling, semiconductor processing, medical diagnostics and instrumentation, and military and aerospace systems.

Click here to learn more about the HighTemp™ flex circuits.