RF Form-In-Place Shielding has taken a massive leap forward with the latest collaborative manufacturing announcement from Saelig Company and European Electromagnetics Consulting Ltd (EECL). As modern commercial and aerospace electronics push into ultra-high frequency spectrums, managing electromagnetic interference (EMI) and radio frequency interference (RFI) has become incredibly complex. Traditional shielding methods often fall short when dealing with multi-band, tightly packed printed circuit boards (PCBs).
To solve this critical bottleneck, EECL has introduced its proprietary, automated RF Form-In-Place Shielding (FIP) gasket services and microwave absorber technologies. Available globally through Saelig, these custom solutions provide unprecedented electromagnetic isolation and environmental sealing for high-performance systems operating across a massive frequency spectrum.
The Technology Behind Automated FIP Gaskets
At the core of this breakthrough is automated dispensing technology capable of executing intricate designs with extreme precision. Traditional shielding reliance on manual adhesive strips or die-cut gaskets frequently introduces mechanical tolerances and performance degradation over time.
EECL eliminates these weaknesses by utilizing computer numerical control (CNC) automated systems to apply conductive silicone elastomers directly onto enclosure walls. These walls can be as thin as 30 mils (0.76 mm). The automated dispensing system maintains a placement accuracy down to 20 microns, allowing engineers to partition complex, small-cavity PCB architectures seamlessly.
The isolation gasket itself consists of a highly conductive silicone elastomer embedded with precisely distributed nickel and graphite particles. When cured, this compound creates a continuous, highly resilient conductive matrix that achieves up to 100 dB of isolation. This level of performance ensures complete electromagnetic containment between neighboring circuit blocks, preventing cross-talk in dense RF designs.
Suppressing Cavity Resonance from 10MHz to 100GHz
Operating at microwave and millimeter-wave frequencies introduces a dangerous phenomenon: cavity resonance. When high-frequency signals reflect off internal metallic enclosure walls, they can create standing waves that severely degrade signal integrity and desensitize sensitive receiver front-ends.
EECL addresses this problem by integrating a proprietary, thin, flexible microwave absorber directly into the enclosure design. Unlike conventional methods that patch absorbers using unreliable double-sided tape, EECL chemically bonds its absorber directly to the internal surfaces of the enclosure.
Precision Engineering Metrics
- Broadband Attenuation: Achieves greater than 100 dB of incident attenuation across critical radar and telecom bands, including the L, S, C, X, Ku, K, and Ka bands.
- Micro-Depth Control: Absorber thickness is meticulously controlled down to 100 microns, making it perfect for complex-shaped or shallow cavities where space is at a premium.
- Surface Conditioning: The internal walls of the enclosures are precision-roughened to optimize RF isolation by cutting down internal coupling paths. Concurrently, external faces are polished smooth to maintain a clean, professional aesthetic for commercial deployment.
Built for Aerospace and Harsh Environments
Electronics deployed in defense, aerospace, and space-grade applications face extreme thermal and vacuum challenges. This new RF Form-In-Place Shielding architecture is engineered specifically to survive these demanding environments.
The conductive elastomers and chemically bonded microwave absorbers can easily withstand sustained operating temperatures up to 170°C. Furthermore, the materials exhibit exceptionally low outgassing properties, satisfying the strict requirements set for deep-space missions and high-altitude flight systems.
Beyond thermal stability, the system accommodates optional high-conductivity thermal pads integrated directly into the enclosure matrix. This enables hardware teams to combine EMI shielding, cavity resonance suppression, and thermal management into a single, cohesive mechanical assembly, drastically speeding up manufacturing workflows.
Scalable Architecture from Prototype to Production
A common challenge for hardware startups and established OEMs alike is the transition from low-volume prototyping to mass manufacturing. Traditional custom shielding techniques require expensive tooling, long lead times, and fixed mechanical designs that resist changes.
Through the engineering resources at aarokatech.com, teams can leverage EECL’s scalable workflows. Because the FIP gaskets are CNC-dispensed and the enclosures are meticulously machined and plated with high-loss tangent nickel, designs can be easily tweaked via software adjustments.
Whether an enterprise requires a single prototype for laboratory validation or a high-volume production run of thousands of units, the automated process yields perfectly repeatable shielding effectiveness. EECL engineers engage directly with customers during the initial PCB layout phase, providing tailored design guidelines or fully engineering the enclosure around the client’s existing PCB layout, shielding everything from internal traces to peripheral connectors and sidewalls.
Technical Specifications Summary
| Feature | Performance Specification |
| Frequency Coverage | 10 MHz to 100 GHz (Broadband) |
| Shielding Isolation | Up to 100 dB |
| Dispensing Precision | Down to 20 microns |
| Minimum Wall Thickness | 30 mils (0.76 mm) |
| Temperature Resistance | Up to 170°C |
| Absorber Depth Control | Down to 100 microns |
