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Compliance Engineering Reference Guide Index
Summit Coating Technologies LLC
25 N. 43rd Ave.
Phoenix, AZ 85009 USA
Tel: 602-455-9365
Fax: 602-455-9370
Web: http://www.summitcoating.com
E-mail: bwojtczak@summitcoating.com
About Us
Established in 1994, Summit Coating Technologies, LLC. "SCT" was relocated to Phoenix Arizona in 1996. The arid desert climate of Phoenix provides an environment that is conducive to both the vacuum metallization and spray coating processes. It is also conveniently located within the proximity of both Mexico’s manufacturing border and California’s high tech Silicon Valley. Since its purchase by a major venture capital firm in August of 1998, SCT has grown from a small operation into an industry-leading provider of shielding services for several Fortune 500 companies.
Introduction
The growing industry of wireless communications and portable hand-held electronic devices drives the need for increased power, processor speed, and smaller plastic enclosures. This creates a demand for a cost effective way to shield out the destructive EMI/RFI/ESD environments in order to ensure their performance and safeguard against failure in the marketplace.
EMI/RFI/ESD Coating Services
At SCT you may choose from two different types of coating services to meet your shielding specifications. Services include physical vapor deposition (PVD), more commonly known as vacuum metallization. This process can be used to apply either a "functional" or "decorative" thin film coating of 99.8% pure aluminum to most plastic injection molded, extruded, or thermoformed enclosures utilizing our Summet® process. SCT services also include spray coating of conductive water based nickel, copper, or silver filled paints.
1) Vacuum Metallization Services
This coating procedure is a physical vapor deposition process whereby plastic
injection molded parts are masked and placed onto a rotating planetary cart within a
vacuum chamber where the deposition takes place. The planetary cart has electrical
buss bars with tungsten filament holders in which a predetermined load of 99.8% pure
aluminum is placed. The chamber is then pumped down to approximately 2 x 10-5 torr. The aluminum is then heated to a vaporized state and is deposited in a line-of-sight trajectory onto the unmasked areas of the plastic parts. This process provides coatings of very high uniformity and batch-to-batch consistency. Typical thickness
for functional thin-film EMI/RFI coatings is 2-3 microns and can be controlled to
within +/- 0.2 microns. This process is commonly used for shielding on small enclosures in the area of 5 x 5 inches and smaller.
Telecomm Industry | 
Medical Industry | 
Electronics Industry |
2) Spray Coating Services with Conductive Paints
This coating procedure is a spray-on process where the plastic injection molded parts
are masked and then spray coated with nickel, copper, or silver filled paints utilizing
high-volume, low-pressure (HVLP) spray gun equipment. Typical thickness for
functional EMI/RFI coatings utilizing a nickel-filled paint is 2-3 mils, copper-filled
paint is 1.5-2.5 mils, and silver-filled paint is 0.5-1.5 mils. This process is commonly
used for shielding on large enclosures in the area of 12 x 12 inches.
Shielding with Conductive Paints
Send us a sample part for your test evaluation and we will coat it free of charge.
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