Exxelia Ohmcraft High voltage resistors in 3D dental imaging

To ensure the reliability of 3D imaging used by dentists, CBCT system manufacturers have relied on Exxelia Ohmcraft's custom high voltage resistors.


To capture adequate images of a patient’s teeth and jaw, dentists rely on advanced 3D imaging from cone-beam computed tomography (CBCT) systems. The CBCT system’s outputs are critical for the accurate diagnosis of oral health concerns and subsequent plans for treatment. To ensure the reliability of these images, manufacturers of CBCT systems have leveraged Exxelia Ohmcraft’s custom, high voltage resistors.

“In general, X-Rays require very high voltages to operate and generate clear, precise 3D images,” said Eric Van Wormer, Vice President of Exxelia Ohmcraft. “Because of the unmatched precision and control in surface-mount and leaded resistors from Exxelia Ohmcraft, manufacturers of this type of technology have turned to us to help ensure the reliability of their systems and the quality of the images they produce.”

CBCT systems are used to assist dentists in a variety of procedures, including dental implant placement, root canal therapy, the treatment of temporomandibular joint (TMJ) dysfunction, and oral surgery.

Exxelia Ohmcraft’s technology utilizes the proprietary Micropen electronic printing system to “print” precise, narrow, serpentine lines with resistive ink on a ceramic substrate, producing higher performance resistors over a wider range of values on a smaller surface area than is possible with conventional film resistor technology.

Published on 17 Mar 2021 by Valentine Taffineau

Exxelia revolutionary MML™ ultra-high energy density Film Capacitors

MML™ is a revolutionary new technology that provides the highest capacitance per volume in film capacitors available on the market.    Why is it a game changer? Because an unparalleled energy density of 400 J/dm3 allows for a tremendous reduction in size and weight compared to traditional Polypropylene or Polyester dielectrics, together with an increased operating temperature up to 140 °C and transient voltage protection.   Besides, MML™ capacitors offer a large flexibility in design, easily allowing low profile configurations. Several studies have been conducted on actual cases of controls and DC-Links functions for aircraft applications. All have shown about 50% reduction in size and weight compared to other film technologies.  The comparative picture with MLCC is even more flattering, as it demonstrates between 70% to 90% reduction in weight, while showing no capacitance derating with voltage applied and a low drift < 5% through the temperature range. Applications using clusters of stacked MLCCs can now be replaced by a single MML™ unit of similar size, with all the increased reliability that film dielectric offers. With such outstanding properties, Exxelia new MML™ capacitors are perfectly suitable for power supplies, DC-links, AC/DC/AC power converters, charge/discharge or power generation functions of commercial/military aircraft, satellite platforms and payloads, launchers, defibrillators, downhole tools and any applications of confined electronics. Samples are readily available on request. Features & Benefits : Miniaturization of the function : Up to 50% size reduction vs other film technologies ; matching footprint with stacked MLCC Lightweight : 50% lighter vs other film technologies ; 80 to 90% lighter than ceramic No capacitance derating in voltage, stable in temperature (<5% drift through the temperature range) Capacitance from 1μF to 1000μF  Voltages from 50V to 1000V  Operating Temperature -55 °C to +140 °C Highly customizable