Shielding Case

A shielding case is a metal component used on a printed circuit board (PCB), a foundational electronic component, to isolate electromagnetic interference. Thus, it enables stable operation in high-frequency and high-density circuit environments.

Its key advantages include:

• Suppression of EMI/RF interference

  Reduces internal radiation emissions while preventing external noise intrusion, supporting EMC/EMI compliance requirements.

• Improved signal integrity

  Minimizes crosstalk, a transfer signal between circuits that causes interference, which enhances the stability of RF and wireless modules.

• Reliable grounding path

  Establishes stable conductivity through grounding tabs connected to the PCB ground layer, providing a controlled path for rapid noise dissipation.
  

• Mechanical protection and serviceability

  Safeguards critical components, prevents foreign object intrusion, and can be designed with a removable cover to improve testing and maintenance efficiency.

• Thermal management compatibility

  Optional venting holes or thermal contact points can be incorporated to assist heat dissipation, depending on product design.

The applications of a PCB EMI shield include consumer electronics such as smartphones, tablets, and wearables; communication and networking equipment such as base stations and antenna modules; automotive electronics; industrial control and automation; and medical electronics.

Ming Chiang is dedicated to producing high-performance shielding cases that effectively protect electronic devices.

• High Consistency in Die Production

  Suitable for high-volume supply, reducing assembly defects and rework.

• Strong Customization Capability

  Height, shape, openings, latching features, positioning structures, and removable covers can all be tailored to product requirements.

• Material and Cost Optimization

  Recommendations on materials and plating options based on conductivity, elasticity, corrosion resistance, and cost targets, including feasible alternatives.

• Thin-profile Design

  Supports miniaturization trends while ensuring compatibility with SMT processes and downstream testing and maintenance.

Common EMI shielding solutions in the market include one-piece structures and two-piece designs. However, over 80% of Ming Chiang’s shielding cases adopt a frame and cover (two-piece) structure. This design provides greater stability, easier maintenance, and reduced risk during both mass production and actual use.

Only the top cover needs to be removed for internal component inspection or adjustment. The design is especially suitable for R&D phases, pilot runs, or products requiring post-production tuning. As a result, many customers engage with us early in the product design stage to adopt removable EMI shielding structures, achieving an optimal balance between electromagnetic protection and serviceability. If you are interested in our OEM and ODM services, please contact us!