TT electronics IRC Advanced Film Division developed a technique to produce custom thick film circuits and assemblies that allow high current-carrying traces (up to 100 amps) to be printed onto ceramic substrates for power hybrids or solid state relay substrates.

"By using these custom thick film circuits, design engineers can integrate current sense resistors with values as low as to 2 milliohms directly into the power hybrid substrate, which is not a possibility with direct bonded copper," said Tom Morris, applications engineering manager. "With this design, the circuits can be printed directly on a heat sink, eliminating the additional costs and processes of connecting a heatsink to a power substrate."

According to Morris, the copper fired thick films allow different types of circuits, including thermistors and temperature sensors, high voltage and pulse withstanding circuits to be combined on one board.

Typical applications are solid state relay substrates, power amplifiers and power supplies, thermo-electric coolers, water level sensors and high-brightness LED circuits.

TT electronics IRC Advanced Film Division, www.irctt.com

Series 556 Vertical Flow Modular Cleanrooms are available in Class 100 or Class 10 softwall or hardwall models. Offer high energy efficiency, facilitate easy maintenance and wipe-down cleaning. Ideal for areas with restricted overall height that need full HEPA filter coverage.
 
Feature all-metal construction, manufactured from heavy-duty 16 gauge cold-rolled steel with a white baked-enamel finish. Includes full-ceiling HEPA filter plenum sections that provide filtered laminar air flow uniformly to clean areas, with filtered air going to 100% of the available surface area.  Blowers and optional cooling coils are contained in the unit's vertical stainless steel support member.
 
 
Clean Air Products, www.cleanairproducts.com

Maynard, MA — QuadTech Inc., an electronic test equipment manufacturer in the passive component, electrical safety and cable test marketplace, announces the availability of its Fusion High Voltage Cable Analyzers for testing wire, cable and harnesses for opens, shorts and mis-wires.
 
Eight models are available with choices that include individual or a combination of AC and DC Hipot test capability, and pin counts to the device under test of 36 or 72 points. Its PC-based intuitive graphical touch-screen makes for easy setup and operation. The automated system allows for custom test programming without the need for scripting. Through component recognition, cable assemblies can be learned and test programs generated automatically.
 
Comprised of a control box and switching box, is ideal for high-volume production testing. Features include:
 
AC Dielectric Withstand Testing 50 to 3500V;
DC Dielectric Withstand Testing to 50 to 3000V;

Insulation Resistance Measurements to 100 Gohms;
Capacitance Measurements from 100pF to 1000μF.
 
Also offers auto learn, component testing, reports generation and several standard interfaces. Can function as a stand alone system or integrated into a larger automated system using digital inputs and outputs.
 
QuadTech, www.quadtech.com 

EA3200H RF absorber matrix proves a measurable effect from 40 MHz to 5 GHz depending on freqency, existing circuit load and are covered by the patch. Peak performance is 3.2 to 5.0 GHz. Easy way to gain 1 to 2 dB without invasive circuit changes.

Installs by removing protective adhesive liner. Available in 6 x 8" (152 x 203 mm) sheets with 24 patches per sheet.

FerriShield Inc., www.ferrishield.com