MICROWAVE CHIP RESISTORS
Thin Film on Ceramic
ORDERING INSTRUCTIONS
Construct Part Number From Choices:
___________ - ___________ - ___________- ___________
(size) (type) (ohms)* (tolerance)
2 MCB D = 0.5%
3 MCG F = 1%
4 MCS J = 5%
%01 = K5
*First 3 digits are significant figures. Fourth is number of zeros to follow or D for decimal between second and third digits.
Example: 2-MCS-1001-J
(Example is a 0.020-by-0.040-inch chip with solder-bump
terminations, 1000 ohms ±5% resistance.)
Spectrum Microwave Chip Resistors are produced with
state-of-the-art thin film sputtering techniques on microwave
grade alumina. The advantages of sputtered over evaporated
metal films include better adhesion to the substrate, increased
reliability, and more uniform composition, density, and
thickness. Their TCR, noise level, and stability are similar to
discrete metal film resistors. The small size and careful
design of Spectrum Microwave Chip Resistors result in low
VSWR and low parasitics. They are available with gold pads
for wire bonding or solder bumps for surface mounting.
FEATURES
• Low VSWR: < 1.2 at 8 GHz
• Low TCR
: 0 to -50 ppm
• Four Sizes:
0.020 X 0.040 to 0.100 X 0.100 inches
• Wire Bond / Solder Mount Option
MCB/MCG (BARE BACK/GOLD BACK)
The MCB and MCG resistors have gold terminations for wirebonds,
although epoxy may also be used. MCB resistors have no backside
metallization. They are die-mounted with epoxy. MCG resistors have
a gold backside metallization. The metallization is electronically
MCS (SOLDER BUMP)
MCS resistors have solder bump terminations for flip-chip surface
mounting. They have no backside metallizing. They can also be
die-mounted with epoxy with solder bumps exposed for connection.
L± .005
.010 MIN.
.003
TYP.
.003 TYP.
T = .010 ± .001
W± .005
L± .005
.010 MIN.
.003 TYP.
W± .005
0.003 TYP.
T = .020 MAX.
isolated from the front terminations.
Spectrum Microwave
Tel: 508-485-6350 Fax: 508-485-5168
165 Cedar Hill Street, Marlborough, Ma 01752
www.SpectrumMicrowave.com
MICROWAVE CHIP RESISTORS
Thin Film on Ceramic
TYPICAL ELECTRICAL DATA
TCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 to -50 ppm
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55° to +150°C
Noise: . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.1 mV/V
VSWR . . . . . . . . . . . . . . . . . . . . . . . . .< 1.2 to 8 GHz
VSWR . . . . . . . . . . . . . . . . . . . . . .< 1.48 to 18 GHZ
Dielectric k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.9
Dissipation Factor . . . . . . . . . . . . . . . . . . . . . . .0.001
Loss Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.0001
Specifications subject to change without notice.
SIZES / POWER / RESISTANCE RANGE
Dimensions Power* Range
(Inches) (mW) (ohms)
Size 2:
0.020 X 0.040 75 10 to 3000
Size 3:
0.050 X 0.050 100 10 to 1500
Size 4:
0.50 X 0.100 150 10 to 1500
Size 5:
0.100 X 0.100 250 10 to 1500
*Maximum continuous rating at 70°C when bonded to substrate.
Derate to zero at 150°C.
SPECIFICATIONS
Substrate:
Material . . . . . . . . . . . . . . . . . . . . . . . .99.6% Al2O3
Thickness . . . . . . . . . . . . . . . . . . .0.010 ± 0.001 in.
Conductor Film Thickness:
MCB
Nichrome . . . . . . . . . . . . .As required for resistivity
Titungsten . . . . . . . . . . . . . . . . . . . . . . .700 Å min.
Gold . . . . . . . . . . . . . . . . . . . . . . . . . .100µ in. min.
MCG
Front . . . . . . . . . . . . . . . . . . . . . . . . .same as MCB
Back
Titungsten . . . . . . . . . . . . . . . . . . .250 ± 100Å
Gold . . . . . . . . . . . . . . . . . . . . . .100µ in. min.
MCS
Nichrome . . . . . . . . . . . . .As required for resistivity
Titungsten . . . . . . . . . . . . . . . . . . . .700 Å min.
Gold . . . . . . . . . . . . . . . . . . . . . . . .7µ in. min.
Nickel . . . . . . . . . . . . . . . . . . . . . .10µ in. min.
Gold . . . . . . . . . . . . . . . . . . . . . . .30µ in. min.
Solder (60/40) . . . . . . . . . . . . . .1 to 3 mils typ
Spectrum Microwave also manufactures Custom Substrates on a variety of materials, a wide range of Microwave, PIN
Diode Drivers, and Custom Hybrid Circuits. Please contact the factory or your local representative for more information.
