Precision Engineering for Global OEMs

Custom EMI/RFI Shielding Can services

From rapid prototyping to high-volume production, Supro MFG delivers one-stop precision metal fabrication with ISO-certified quality. Reduce your lead times and production costs with our expert DFM support.

1-3 day Rapid Prototyping & Agile Supply Chain Delivery.
On-time delivery of high quality product commitments.
Extensive Material Selection & Industrial-Grade Finishing.
Direct-from-Factory Pricing & Transparent Costing.
ISO 9001-2015 / IATF 16949:2016 certified system.
Integrated Assembly: Delivering finished, ready-to-use products, not just components.

Get An Instant Quote Now

Rapid Prototypes, DFM Optimization, On-Time Delivery, Real Manufacturer Quote.

Rapid stamping die Turnaround

Committed to exceeding expectations for quality and rapid turnaround, and meeting high-quality sheet metal parts.

Consistency & high quality

Whether it is rapid prototyping & large-volume manufacturing, we will implement it according to customer needs and standards.

Low Cost Effective

Integrate product design, bending, stamping, cutting, surface treatment, etc. to provide a series of manufacturing solutions.

Precision Metal Fabrication Services in China | Custom OEM Solutions & Rapid Prototyping

Your Strategic Partner for EMI/RFI Shielding Can Fabrication

At Supro MFG (Supro Manufacturing Co., Ltd.), we don’t just manufacture parts; we engineer reliability. As a leading China metal fabrication factory, we bridge the gap between complex design and cost-effective production. By leveraging our ISO 9001:2015 & IATF 16949 certified facilities and a seasoned engineering team, we provide 3,000+ global clients with unparalleled custom metal fabrication services—direct from the source with transparent, manufacturer-level pricing.

We specialize in the high-quality manufacturing and assembly of custom metal parts, with processing capabilities encompassing: sheet metal fabrication, metal stamping, CNC machining, laser cutting, metal welding, metal spinning, deep drawing, aluminum extrusion, die casting, as well as customized finished product assembly and surface treatment services.

From concept prototypes to mass production,

Supro MFG is your most reliable partner and you will benefit from our manufacturing services.

What Is an EMI/RFI Shielding Can

An EMI/RFI Shielding Can is a precision-engineered metal enclosure designed to isolate sensitive printed circuit board (PCB) components from disruptive electromagnetic and radio frequency interference. These custom EMI/RFI Shielding Cans operate on the Faraday cage principle, limiting the propagation of high-frequency noise to ensure your equipment meets stringent electromagnetic compatibility (EMC) requirements while preventing crosstalk and signal degradation.

Our EMI/RFI Shielding Cans are manufactured from high-permeability alloys (such as nickel silver or tin-plated cold-rolled steel) to ensure excellent solderability, optimal coplanarity, and maximum decibel attenuation across a wide frequency spectrum. Because complex PCB structures require precise tolerances, off-the-shelf solutions often fall short of meeting these demands.

At Supro MFG, we leverage our advanced custom sheet metal fabrication capabilities to provide fast, high-precision EMI/RFI shielding can solutions that are fully tailored to your specific engineering specifications.

Securing Your Designs with Enterprise-Grade Confidentiality at Every Stage of Manufacturing

Your Innovation, Protected:
Uncompromising IP Security & NDA Compliance

At Supro MFG, we understand that your designs are your most valuable assets. As a strategic sheet metal stamping partner, our commitment to your intellectual property is absolute. We operate under a strict Zero-Leak Policy, ensuring that every blueprint, CAD file, and prototype remains strictly confidential within our secure engineering ecosystem.

We proactively offer comprehensive Non-Disclosure Agreements (NDAs) that align with international legal standards, providing you with a transparent and enforceable framework for cooperation. Beyond legal paperwork, our internal protocols include segmented data access, secure server encryption, and rigorous staff training on IP sensitivity. Whether you are a startup scaling a disruptive product or an OEM managing sensitive aerospace components, Supro MFG acts as a secure extension of your own facility. Partner with a metal stamping manufacturer that values your competitive advantage as much as you do.

Talk to our expert team

Common Issues with EMI/RFI Shielding Cans

When evaluating and procuring EMI/RFI shielding cans, the manufacturing precision and consistency of the product directly determine the yield rate of the PCBA (printed circuit board assembly) and the electromagnetic compatibility (EMC) of the final device. Based on our years of experience in high-end custom sheet metal stamping and customer feedback, we have identified the most common defects in the manufacturing and application of EMI/RFI shielding cans, and provide you with analyses of their root causes and engineering solutions.

RF Leakage / Reduced Shielding Effectiveness

The device fails EMC testing, and the shielding effectiveness of the EMI/RFI shielding can deteriorates significantly at high frequencies. The causes include: excessive gaps at the edges and corners; improper vent hole design (hole diameter exceeding 1/20 of the interference frequency wavelength); and uneven contact surfaces leading to broken ground loops.

So, how can this be resolved?

Optimize the structure of the EMI/RFI shielding can by adopting labyrinth seams or seamless deep-drawing. Precisely calculate and balance the relationship between heat dissipation vents and electromagnetic shielding to ensure the integrity of the Faraday cage.

Internal Component Short-Circuit Interference

The inner top surface of the EMI/RFI shielding can comes into contact with heat-generating chips or exposed pins on the PCB, causing direct hardware short-circuits and burnout. The causes of this issue include: insufficient design clearance in the Z-axis height; thermal sagging; and a lack of insulating protective layers.

Supro automatically applies Kapton (polyimide) high-temperature insulation tape or Mylar film to the inner top surface of the EMI/RFI shielding can, providing insulation withstand voltages of up to several thousand volts. We use 3D interference checks to ensure that absolutely safe clearances are maintained between internal components.

Plating Peeling or Flaking

Peeling of the electroplated layer at the bends or on flat surfaces of the EMI/RFI Shielding Can exposes the internal substrate, leading to galvanic corrosion and potentially contaminating the cleanroom PCBA environment. The causes include: incomplete degreasing and activation cleaning of the substrate prior to plating; and excessively small bend radii that exceed the ductility limits of the plated metal.

Supro implements extremely rigorous surface pretreatment processes. During the initial product design phase, we ensure that the bend radius (R) complies with material properties (typically R ≥ 1T). Batch sampling must pass the cross-hatch adhesion test or the 3M tape peel test to verify adhesion.

Discoloration After SMT Reflow

After exposure to the high temperatures of lead-free reflow soldering (approximately 260°C), the surface of EMI/RFI shielding cans may develop extensive yellow spots or oxidation marks, affecting product appearance and corrosion resistance. The causes include: the use of non-volatile, residue-prone stamping oils during the stamping process; plating processes unable to withstand instantaneous high temperatures; and poor storage conditions leading to minor oxidation prior to processing.

Supro uses high-quality, residue-free, volatile stamping oil throughout the entire stamping process. Our surface treatment specifications are explicitly designed to be compatible with lead-free reflow soldering temperature profiles, completely eliminating the residual impurities that can cause oxidation.

No design files? Let Supro MFG do it for you.

We often come across clients who have no professional design drawings and documentation, only a creative idea, which leads to the project being at a standstill.

If you are in this situation, then contact our team of experts.

Supro MFG, as an industry-leading custom metal fabricator, has an ever-experienced team of engineers who utilize their extensive fabrication experience and technical expertise to build your idea into a real product and create design files such as STEP/STP/SLDPRT/DXF/PDF/PRT/DWG/AI.

That’s what makes SUPRO MFG so great, and 2,000 corporate, entrepreneurial, artist, and other purchasers from around the world enjoy working with us and benefiting from our one-stop manufacturing services.

A part is only as good as its finish.

High-Performance Surface Finishing: Aesthetics Meets Durability

At Supro MFG, we understand that professional custom metal fabrication requires more than just structural integrity—it demands surface treatments that withstand harsh environments and strict aesthetic standards.

Our integrated finishing shop provides a seamless transition from the production line to the final coating, ensuring tight control over lead times and quality.