INDUSTRY COMPONENT

EMI Shield

EMI shield for computer server backplane connectors to prevent electromagnetic interference and ensure signal integrity.

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Component Specifications

Definition
An EMI shield is a conductive enclosure or barrier designed to contain or block electromagnetic interference (EMI) emitted by electronic components, particularly in high-speed computer server backplane connectors. It prevents crosstalk, reduces electromagnetic emissions, and ensures compliance with regulatory standards by maintaining signal integrity and minimizing data transmission errors in server assemblies.
Working Principle
Works by reflecting, absorbing, or redirecting electromagnetic waves using conductive materials (e.g., metals, conductive coatings) to create a Faraday cage effect, isolating sensitive connector circuits from external EMI sources and internal emissions.
Materials
Typically made from beryllium copper, stainless steel, aluminum alloys, or nickel-plated steel; may include conductive elastomers or gaskets for sealing; thickness ranges from 0.1mm to 0.5mm depending on shielding effectiveness requirements.
Technical Parameters
  • Dimensions Custom-fit to connector assembly
  • Frequency Range 30 MHz to 6 GHz
  • Contact Resistance <10 mΩ
  • Operating Temperature -40°C to 85°C
  • Shielding Effectiveness ≥40 dB at 1 GHz
Standards
IEC 61000-4-3, MIL-STD-461, EN 55032

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for EMI Shield.

EMI shield server backplane connector electromagnetic interference shielding computer server components EMI compliance signal integrity EMI Shield in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Computer Server Backplane Connector Assembly

High-density interconnect assembly for server motherboard-to-peripheral communication

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Engineering Analysis

Risks & Mitigation
  • Inadequate shielding leading to data corruption
  • Material corrosion reducing conductivity
  • Improper installation causing gaps in shielding
FMEA Triads
Trigger: Poor material selection or thin gauge
Failure: Insufficient shielding effectiveness, EMI leakage
Mitigation: Use certified materials with ≥40 dB effectiveness and regular compliance testing
Trigger: Mechanical stress or vibration
Failure: Shield deformation or detachment, compromised integrity
Mitigation: Design with robust mounting features and conduct vibration testing per industry standards

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm for dimensional fit, shielding effectiveness within ±2 dB of spec
Test Method
Radiated emissions testing per EN 55032, conducted immunity per IEC 61000-4-6

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of an EMI shield in a server backplane connector?

To block electromagnetic interference, ensuring reliable data transmission and preventing signal degradation in high-speed server environments.

How do you test the effectiveness of an EMI shield?

Using standardized methods like IEC 61000-4-3 for radiated immunity and EN 55032 for emissions, measuring shielding effectiveness in decibels across specified frequency ranges.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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