aerospace

**Aerospace Defense Semiconductor** is **military-grade semiconductor components for aircraft, missiles, defense systems meeting strict specifications for reliability, radiation resistance, temperature operation** — highest-reliability requirements. **Aerospace Standards** DO-254 (hardware design assurance), MIL-STD standards (reliability). **Altitude Environment** temperature ranges from −55 to +125°C. Pressure varies. **Radiation** higher altitude: increased cosmic ray exposure. **Vibration** aircraft/launch vehicle vibration severe. Shakers test to specifications. **Mechanical Shock** ejection, crash landing, deployment shock. **Electromagnetic** military EMI environment hostile. Shielding, filtering required. **Screening Tests** 100% parts screened (burn-in, electrical testing). Sample destructive testing. **Procurement** military procurement through qualified vendors. Traceability documented. **Parts Selection** commercial-off-the-shelf (COTS) increasingly used with screening. Cost vs. custom design. **Obsolescence** parts become obsolete (manufacturer discontinues). Mitigation: procurement strategies, alternative part qualification. **Space Applications** satellites, space probes. Higher reliability (cannot service). Lower failure rates acceptable if redundancy provided. **Hermetic Packaging** ceramic or metallic packages. Enhanced protection vs. plastic. **Potting** conformal coatings, potting compound protect from humidity. **Burn-In** accelerated aging identifies early failures. Typically 160°C, 48-500 hours. **Long-Term Storage** military parts stored many years. Moisture barrier packaging (desiccant). **Aging** long-term drift in parameters. Tested and documented. **Process Technology** mature nodes preferred (90 nm−180 nm). Newer advanced nodes qualification underway. **Qualification** lengthy: characterization, testing, approval months to years. **Design Review** formal design reviews (preliminary, critical). Documentation comprehensive. **Redundancy** critical functions often triple-redundant. Voting logic. **Hardened Logic** gate hardening against radiation. Guard rings, enclosed structures. **Testability** built-in self-test (BIST) enables in-flight diagnostics. **Traceability** serial numbers, batch records maintained. **Aerospace semiconductors enable critical defense systems** with highest reliability.