R400AR Series

Description

Heraeus’ R400AR Series is a low range, lead free, low TCR air-fired resistor system, compatible with lead free Pt/Ag and Pd/Ag conductors. This series gives a dense fired film and was designed to give very tight resistance distribution when co firing the front and back side of circuits. The series exhibits excellent print resolution for use in typical serpentine layouts. Heraeus’ R400AR Series is laser trimmable and has outstanding power handling capability.

Key Features

Low range ohmic resistor Low TCRs Dense microstructure Tight as fired distribution

Metal

AgPd

Viscosity

180 – 260 Kcps, Brookfield HBT, SC4 – 14 spindle and 6R utility cup at 10 rpm, 25 °C

Coverage

 

Coverage

 

Storage and Paste Preparation

Store in a dry location at 5 °C – 25 °C.

Warranty

6 months

Printing Parameters

250 – 325 mesh, 1.1 mil wire and 0.5 mil emulsion screen

Printing Speed

 

Drying Temperature

150 ºC for 8 – 10 minutes

Process Temperature (TDS)

850 °C peak temperature Dwell time of 10 minutes at peak

Film Thickness

Dried: 12-21 microns Fired: 7-13 microns