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For technical questions, contact: efi@vishay.com

Document Number: 61023

54

Revision: 12-Mar-08

BCR

Vishay Electro-Films

Thin Film, Back-Contact Resistor

The

Back

Contact

Resistor

(BCR)

series

single-value

back-contact resistor chip is one of the smallest chips available.

The BCR requires only one wire bond thus saving hybrid space.

The BCRs are manufactured using Vishay Electro-Films

(EFI) sophisticated thin film equipment and manufacturing

technology. The BCRs are 100 % electrically tested and

visually inspected to MIL-STD-883.

FEATURES

• Wire bondable

• Only one wire bond required

• Small size: 0.020 inches square.

• Resistance range: 10 Ω to 1 MΩ

• Oxidized silicon substrate for good power dissipation

• Resistor material: Tantalum nitride, self-passivating

• Moisture resistant

APPLICATIONS

Vishay EFI BCR resistor chips are widely used in hybrid packages where space is limited. The bottom connection is made by

attaching the back of the chip to the substrate either eutectically or with conductive epoxy. The single wire bond is made to the

notched pad on the top of the chip. (The other rectangular pad on the top of the chip is a via hole, a low-ohmic contact connecting

the resistor to the bottom of the chip.)

Product may not

be to scale

TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES

PROCESS CODE

CLASS H*

CLASS K*

010

056

002

061

027

059

008

052

*MIL-PRF-38534 inspection criteria

0.1 %

Tightest Standard Tolerance Available

± 250 ppm/°C

± 50 ppm/°C

± 100 ppm/°C

0.2 %

1 M

Ω

100

Ω

10

Ω

200 k

Ω

± 25 ppm/°C

20

Ω 50 Ω

200

Ω 1 kΩ

360 k

Ω

620 k

Ω

0.5 %

1 %

2 %

5 %

STANDARD ELECTRICAL SPECIFICATIONS

PARAMETER

Noise, MIL-STD-202, Method 308

100

Ω - 250 kΩ

< 100

Ω or > 251 kΩ

- 35 dB typ.

- 20 dB typ.

Moisture resistance, MIL-STD-202

Method 106

± 0.5 % max.

ΔR/R

Stability, 1000 h, + 125 °C, 125 mW

± 1.0 % max.

ΔR/R

Operating Temperature Range

- 55 °C to + 125 °C

Thermal Shock, MIL-STD-202,

Method 107, Test Condition F

± 0.25 % max.

ΔR/R

High Temperature Exposure, + 150 °C, 100 h

± 0.5 % max.

ΔR/R

Dielectric Voltage Breakdown

200 V

Insulation Resistance

Operating Voltage

75 V max.

DC Power Rating at + 70 °C (Derated to Zero at + 175 °C)

250 mW

5 x Rated Power Short-Time Overload, + 25 °C, 5 s

± 0.25 % max.

ΔR/R