Vacuum Metallizing vs Traditional Shielding

PMT Shielding Solutions & Plastic-Metals Technologies offers a unique and specialized process tailored for your project using physical vapor deposition (PVD) techniques. EMI and RFI shielding has been used in many industries for decades, but using the same technology to shield 30 years ago doesn't meet the needs of the high tech world of today. The evolution of parts, products, and emission levels have increased year-over-year, but engineers and companies still choose to have the oldest forms of shielding. Our goal is to provide you with a solution for your EMI/RFI shielding needs and cutting edge products.


Traditional means include metal flake paints or thermal spray, copper or other metal tapes,  dip plating, and high chemical coatings.


Vacuum metallizing involves heating the coating metal to its boiling point in a vacuum chamber, then letting condensation deposit the metal on the substrate's surface.

The same process was used to deposit aluminum on the large glass mirrors of reflecting telescopes, such as with the Hale telescope.


Vacuum deposition is a family of processes used to deposit layers of material atom-by-atom or molecule-by-molecule on a solid surface. These processes operate at pressures well below atmospheric pressure (i.e. vacuum).

pmt shielding process

EMI/RFI Shielding Solutions

Plastic-Metals Technologies, inc

503.684.0725

7051 SW Sandburg Rd, Suite 400, Tigard, OR 97223

What is EMI & RFI?


RFI (Radio Frequency Interference), which is also known as EMI (Electromagnetic Interference) is any electromagnetic radiation or disturbance which is emitted from an electrical circuit or electronic component that interrupts or interferes with the operation of other electronic components, or electrical circuits. RFI or EMI may be introduced intentionally as in the case of electronic warfare, or unintentionally from an electronic or electrical device or system. EMI may also be created as a result of a nuclear explosion.


Why choose PMT Shielding Solutions 1-micron, Two-Layer System for your shielding needs?


PMT Shielding Solutions uses Physical Vapor Deposition (PVD), which means NO chemicals are involved, only pure metals from a solid state. The vacuum allows vapor particles to travel directly to the object (substrate), where they condense back to a solid state, thus creating a 1-micron layer consisting of two layers of metal and serving as an extremely dense and high performing EMI/RFI shield.


The two-layer system is what sets PMT Shielding Solutions and Plastic-Metals Technologies apart from any other EMI/RFI shielding company. With proven independent test results, we have found that the combination of Copper and Secondary metal (Aluminum, Nickel, or Stainless Steel) is far superior to a single stage process, and actually provides a more stable, durable,  and consistent surface.