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The R1025-S series of microwave thin film resistors is designed to be used in microwave hybrid circuits for biasing of active components. These devices can be used over the full military temperature range -55°C to +125°C. Quality and workmanship is per MIL-S-883. Level B. Devices are 100% tested, visual inspected and packaged in waffle packs. US Microwaves employs proprietary thin film technologies for deposition of a wide range of sheet resistance films from 1W/sq to 10.000W /sq. Resistors from 0.1W to x MW range are available.

R(W) USM Part # R(W) USM Part # R(W) USM Part # R(W) USM Part #
1.0 R1025-S-1P0 10 R1025-S-10P0 100 R1025-S-100P0 1000 R1025-S-1000
1.2 R1025-S-1P2 12 R1025-S-12P0 120 R1025-S-120P0 1200 R1025-S-1200
1.5 R1025-S-1P5 15 R1025-S-15P0 150 R1025-S-150P0 1500 R1025-S-1500
1.8 R1025-S-1P8 18 R1025-S-18P0 180 R1025-S-180P0 1800 R1025-S-1800
2.2 R1025-S-2P2 22 R1025-S-22P0 220 R1025-S-220P0 2200 R1025-S-2200
2.7 R1025-S-2P7 27 R1025-S-27P0 270 R1025-S-270P0 2700 R1025-S-2700
3.3 R1025-S-3P3 33 R1025-S-33P0 330 R1025-S-330P0 3300 R1025-S-3300
3.9 R1025-S-3P9 39 R1025-S-39P0 390 R1025-S-390P0 3900 R1025-S-3900
4.7 R1025-S-4P7 47 R1025-S-47P0 470 R1025-S-470P0 4700 R1025-S-4700
5.0 R1025-S-5P0 50 R1025-S-50P0 500 R1025-S-500P0 5000 R1025-S-5000
5.6 R1025-S-5P6 56 R1025-S-56P0 560 R1025-S-560P0 5600 R1025-S-5600
6.8 R1025-S-6P8 68 R1025-S-68P0 680 R1025-S-680P0 6800 R1025-S-6800
7.5 R1025-S-7P5 75 R1025-S-75P0 750 R1025-S-750P0 7500 R1025-S-7500
8.2 R1025-S-8P2 82 R1025-S-82P0 820 R1025-S-820P0 8200 R1025-S-8200

Material Thickness (mils) Die size (mils) Power rating Tolerances q% Capacitance
SiO2/Silicon 10 ±1 (10±2)x(25±2) 50mW@70°C 1, 5, 10 <0.6pF

Resistor Conductor Backside metallization
The resistive material is high stability Tantalum Nitride with low temperature coefficient of resistance, <75ppm/°C typical. For Rsq<10W/sq and Rsq>500W/sq, the resistive material is proprietary. The bonding pads of the resistors are 3m thick, 99.99% electroplated gold with a TiW barrier that withstands 30 min at 400°C in air without loss of adhesion. The backside of the die is metallized with TiW/Au which is compatible with most die attaching methods. Other metallizations are available upon special request.


TOLERANCE q MINIMUM ORDER U/P($) /1K U/P($) /5K U/P($) /10K U/P($) /50K U/P($) /100K DELIVERY ORDER
10% 2 weeks ARO for 5% and 10% tolerance and 3-4 weeks ARO for 1%. Certain items are available from Stock

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