OEM / ODM Multi Layer Inductor Noble Metal Inductor Anti Microphonic Damping Low

Product Specification

Custom Conical Inductor Anti Microphonic Damping Low Outgassing NASA Standard Noble Metal Composite

HACC-CUSTOM-AD: Anti-Microphonic Damped Low-Outgassing Conical Inductor with Noble Metal Plating

Dual-Action Anti-Microphonic Damping Formulation

Conical inductors in high-vibration environments — airborne platforms, launch vehicles, spacecraft during ascent — act as microphonic transducers: mechanical vibration induces winding displacement relative to the magnetic field, modulating inductance and generating spurious electrical noise at the vibration frequency. This microphonic noise can be 20–40 dB above the thermal noise floor in sensitive receiver chains. The HACC-CUSTOM-AD eliminates this with a dual-action damping formulation. Layer 1 is a 0.05–0.15 mm viscoelastic polymer coating (tan δ >0.3 at 1 kHz, silicone-free) applied directly to the winding — it absorbs mechanical vibration energy through molecular relaxation, converting kinetic energy to heat without adding mass or stiffness. Layer 2 is a 0.02–0.05 mm constrained-layer top coat of metallic-loaded epoxy that creates a stiff outer shell — when the inner viscoelastic layer deforms, the constrained outer layer forces shear deformation in the viscoelastic layer, maximizing energy dissipation per cycle. The combined dual-action system achieves over 20 dB microphonic noise reduction from 1–10 kHz, with winding displacement maintained below 0.1 µm under 5 g vibration from 20 Hz to 2 kHz. The mechanical Q at resonance is below 5 — no ringing, and settling time is under 10 µs after an impulse.

Certified Low-Outgassing Process matching NASA Standards

Spacecraft and high-vacuum scientific instruments cannot tolerate organic outgassing — condensed volatiles on optical surfaces, thermal control coatings, or detector arrays degrade performance and can cause mission failure. The HACC-CUSTOM-AD is produced under a certified low-outgassing process: all materials are screened per ASTM E595, achieving total mass loss (TML) below 1.0% and collected volatile condensable material (CVCM) below 0.1%. No silicone, no phthalates, and no halogens are used in any material — including the anti-microphonic damping layers, the dot-fixing epoxy, and the wire plating. Every device undergoes a vacuum bake-out at 125°C for 24 hours prior to shipment, with post-bake TML verified below 0.5%. Material traceability is maintained per recognized space industry standards for each production lot. The device is qualified for 10⁻⁹ Torr vacuum with no volatile condensables after 72 hours of vacuum exposure.

Multi-Layer Noble Metal Composite Plating

The Au/Pd/Ni/Cu plating stack — identical to the NM variant — provides corrosion resistance and bondability without introducing volatile metal surfaces. Wire bond pull strength above 4.0 g is maintained post-vacuum bake, and no Pd-Au intermetallic growth occurs after the 125°C/24h bake-out procedure.

Key Specifications

Applications

• Spacecraft RF Payloads — ASTM E595 certified low-outgassing, 10⁻⁹ Torr vacuum qualified, anti-microphonic damped for launch vibration survival
• Airborne Electronic Defense Systems — >20 dB microphonic suppression, mechanical Q <5 for platform vibration immunity, noble metal plating for altitude-corrosion resistance
• Cryogenic Scientific Instruments — Vacuum-baked 125°C/24h, TML <0.5%, silicone-free materials for detector-contamination-free operation
• High-Vibration Industrial RF — Dual-action damping for 5 g continuous vibration, <0.1 µm winding displacement, Au/Pd/Ni/Cu corrosion-protected

Contact us with your vibration environment, vacuum requirements, and outgassing specifications. Anti-microphonic damped low-outgassing conical inductors ship in 5–7 business days.