Low Shunt Capacitance and Strip-Line Resistor Design Optimized for Microwave Circuits

MALVERN, PENNSYLVANIA - April 25, 2003 - A series of thin-film single-value chip resistors, featuring excellent high-frequency response and low shunt capacitance for exceptional performance in hybrid assemblies and microwave and RF circuits, was announced today by Vishay Intertechnology, Inc. (NYSE: VSH).

In addition to dimensions as small as 0.010" (0.25 mm) by 0.020" (0.5 mm), the Vishay Electro-Films Microwave Resistor series (MIB, MIC, MID, MIF) features a strip-line design that enables the design of higher-performance end products by providing a solution specifically optimized for microwave and RF requirements. Typical applications for new devices include amplifiers, oscillators, attenuators, couplers, and filters.

Devices in the Microwave Resistor series feature a microwave resistance range of 20 O to 1 kO and an overall resistance range to 20 kO. Tight tolerance values down to ±1.0% are available, with TCR values from ±25 ppm/°C to ±200 ppm/°C. These compact resistor chips provide a stray capacitance of less than 0.2 pF.

Vishay Electro-Films Microwave Resistor series devices feature a maximum operating voltage of 100 V, a dielectric breakdown voltage of 400 V, and 25-mW to 200-mW maximum DC power ratings at +70°C. The high-stability thin-film resistor element is tantalum nitride, which is self-passivating and moisture resistant. These resistors have an operating temperature range of -55°C to +125°C.

The MIB, MIC, MID, and MIF microwave resistor chips are built with an alumina substrate and gold terminations. They can be attached with conductive epoxy, ribbon-bonded, or wire-bonded. Other Vishay devices that are suitable for use with the Microwave Resistor series include wire-bondable capacitor chips, inductor chips, user-trim resistor chips, and TMR multi-value microwave products.

Samples of the MIB, MIC, MID, and MIF chips are available now, with lead times of six weeks for production quantities.