Industries
Aerospace & Defense PCB
Polyimide substrates, MIL-PRF-31032 and IPC Class 3/3A fabrication.
Aerospace and defense electronics operate in environments that combine extreme temperature, vibration, shock, altitude, radiation and product lifetimes measured in decades. Military PCB and aerospace PCB manufacturing requires materials qualified for these environments, fabrication processes verified through destructive testing, and documentation that provides complete traceability from raw material through final inspection. AstroPCB manufactures aerospace and defense PCBs to IPC-6012 Class 3/3A with the quality systems and documentation expected by defense prime contractors.
Environmental requirements
Aerospace PCBs must survive temperature ranges from -55°C to +125°C (or wider for space applications), with thermal cycling endurance tested to thousands of cycles without degradation. Vibration profiles from launch vehicles, turbine engines and military vehicles impose mechanical stress that tests solder joint integrity, via barrel reliability and laminate adhesion. Altitude affects boards through reduced atmospheric pressure, which can cause outgassing from laminate materials and trapped air in conformal coatings. For space applications, radiation tolerance of materials and the absence of tin whisker risk (no pure tin finishes) are additional constraints.
Material selection
Polyimide-based laminates are the standard for aerospace applications requiring extreme thermal endurance. Polyimide provides Tg above 250°C and Td above 400°C, with excellent resistance to thermal cycling fatigue. For RF and radar applications, Rogers and PTFE laminates provide the low-loss performance needed for antenna systems, receiver front ends and electronic warfare modules. High-Tg FR-4 (Isola 370HR) is acceptable for less demanding aerospace applications where the temperature and reliability requirements fall within its capability.
Surface finish selection avoids pure tin (tin whisker risk) and typically specifies ENIG, ENEPIG or immersion silver. For wire-bondable surfaces, ENEPIG or electrolytic gold over nickel is specified. Solder mask must be qualified for the temperature range — standard solder mask may crack or delaminate under extreme thermal cycling.
Military PCB specifications
Military PCBs are fabricated to MIL-PRF-31032 (performance specification for printed wiring boards) or IPC-6012DS (defense and space addendum). These specifications impose additional requirements beyond standard IPC-6012 Class 3: destructive physical analysis (cross-sectioning) on every production lot, thermal stress testing (288°C solder float for 10 seconds), microsection inspection with quantified measurements of plating thickness, etch uniformity and registration accuracy, and coupon-based testing that travels with the production panels.
Quality and traceability
Every aerospace PCB lot is traceable to the specific laminate lot, copper foil lot, solder mask lot and surface finish chemistry batch used in fabrication. Process records document the lamination parameters (temperature, pressure, cycle time), drilling parameters, plating bath composition and analysis results, and inspection data for each production panel. This level of documentation supports the quality system requirements of AS9100 (aerospace quality management) and enables root cause analysis if a field failure occurs years after delivery.
Common aerospace PCB types
Radar and electronic warfare modules use multilayer RF boards on Rogers or PTFE with controlled impedance and high isolation between channels. Avionics and flight computers use high-reliability multilayer boards with polyimide substrates, Class 3A inspection criteria and conformal coating. Satellite and space electronics require radiation-hardened material selections, outgassing-qualified materials per NASA ASTM E595, and enhanced screening and inspection protocols.
Request an aerospace PCB quote
Specify the applicable military or aerospace specification, IPC class, material preferences, surface finish and documentation requirements. Upload your design files and the engineering team will review for compliance and manufacturability.