EMI & RFI Shielding

EMI (Electromagnetic Interference), and RFI (Radio-Frequency Interference), are disturbances in electrical equipment caused by an external source’s electromagnetic emissions. 

Although EMI and RFI are used interchangeably, the difference between the two is simply that EMI includes any frequency of electrical noise, while RFI refers only to specific subsets of electrical noise (i.e. radio frequency spectrum).

EMI and RFI shields are designed to limit the number of electromagnetic waves in a particular space or device to prevent interference with other devices. EMI shields, sometimes referred to as shielding enclosures, use conductive or magnetic materials in order to block the waves from entering/leaving a device.

Most Common Uses:

  • Military (such as helicopters, aircraft, drones, etc.)
  • Aerospace (such as satellites, cockpit sensors, etc.)
  • Electronics (such as computers, controllers, etc.)
  • Commercial products (such as mobile phones, radios, baby monitors, etc.)

Photochemically Etched Shielding

At Microphoto, we provide customers with high-quality and high-precision parts through our photochemical machining process, also known as photochemical etching, metal etching, or chemical milling.

Photochemical machining allows for the manufacture of finely detailed and complex designs that could not be manufactured using other more traditional methods such as stamping.  Our process results in parts that are burr-free, and without any recast layers that can result from laser cutting or WEDM processing.

We can also manage any post-production secondary requirements such as passivation, heat treat, plating, or non-destructive testing.

Microphoto’s Shields

Microphoto’s team uses only quality materials and expert knowledge to provide our customers with effective and durable photo-etched EMI/RFI shields. Our photochemical etching machines allow for the creation of bend lines on the product.

Common EMI/RFI Shielding Materials

  • Aluminum
  • Beryllium Copper
  • Brass
  • Copper
  • Cold-rolled steel
  • Inconel X750
  • Nickel Silver
  • Phosphorus Bronze
  • Stainless Steel