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Electrically

Insulating

Coatings

Our experience in materials engineering has led to the creation of some of the best, most effective dielectric coatings in the industry. Through years of in-house R&D, we’ve developed dielectric coatings with superior physical characteristics. Our coatings have high bond strengths and features less than 0.1% porosity creating a theoretically dense layer with dielectric strengths up to 1,000 volts/mil or greater, and typical hardness of 1,100 DPH/Vickers.

Our dielectric coatings are used for high and low voltage applications over the range of DC to RF. They can be applied to an almost limitless number of materials, enabling us to produce dielectric coatings to solve even the most complex electrical challenges. 
 

TST fixturing, tooling, and cell design for dielectric coatings are specially engineered. Our unique materials, parameters, and equipment enable us to produce high quality dielectric coatings at high production volumes.

 

Dielectric Coating Materials

The most commonly used dielectric materials are oxide ceramics and polymers. Ceramics are more durable, wear and corrosion resistant, and have higher dielectric strengths than polymers. Common materials include oxides of aluminum, titanium, and yttrium. Other materials, alloys, and compounds are used as well.

 

Substrate Materials

There are few, if any, limitations to the substrate materials. Typically, dielectric coatings are applied to metallic substrates, however, composite structures can also be coated. Where the application for a dielectric coating involves high temperatures, gradated coatings are employed to mitigate differential expansion between the substrate and the dielectric coating.

 

Finishing

Our dielectric coatings can be superfinished to an average surface roughness (Ra) as low as four microinches or less. 

For applications involving elevated temperatures, we have developed gradated dielectric coatings to accommodate the differentials in expansion rates between the substrate and the coating.

We can also employ proprietary sealers to enhance the performance of coated components in harsh or extreme environments.

 

Examples

Applications for our dielectric coatings include semiconductor heat sinks, corona suppression in high voltage systems (including PVD processing), application of high-temperature strain gauges, fabrication of thermal spray resistance heaters, as substrates for sprayed electrical conductors, and free-standing electrical insulators such as laser wave guides.