Metal film resistor, Physics

Assignment Help:

MANUFACTURING: Nickel film is deposited on ceramic substrate. This is done by electrolytic deposition of nickel in a chemical bath containing hypophosphate. The sheet resistance is controlled by the amount of nickel and Ni-P alloys depositing on substrate.

SPECIFICATIONS:

Ohm values                                                                         0.2 ohm/sq. Cm to 10000 ohm/sq. Cm

Tolerances                                                                           > 2%

Stability                                                                               2%

Temperature coefficient of resistance                                       <+200 ppm /0C

Working voltage                                                                    300 volts

Working temperature                                                             -40 to 1500C

APPLICATIONS: Photolithographic techniques are used to manufacture this type of resistor. Alloy of nickel and chromium in a ratio 80: 20 or 50: 50 are deposited on ceramic substrate by sputtering in vacuum. Then a resistive film pattern of predetermined length and width is etched out with the help of masks. This process is cost-effective for mass production. Very low mass production. Very low temperature coefficient of resistance and stability are attained by adding small quantities of copper, aluminium, or iron.

SPECIFICATIONS:

Ohm range                                                                           1 ohm/sq-cm to 5 kilns-ohms/sq-cm

Temperature coefficient of resistance                                                                    50 ppm /0C

APPLICATIONS: There are used in semi-precision and precision applications.


Related Discussions:- Metal film resistor

Use of magnesium alloys, Magnesium is the lightest of the structural metals...

Magnesium is the lightest of the structural metals.  While this low density is an attractive property, magnesium also has a high corrosion rate that has often been seen as a disadv

MOSFET, How do we experimentally know that MOSEFT device is working?

How do we experimentally know that MOSEFT device is working?

Show diffrence between diffraction and interference, Q. Illustrate what is ...

Q. Illustrate what is the dissimilarity between diffraction and interference? Answer:- Diffraction is the yielding of waves around an obstacle while interference is the me

Fluid Mechanics, Hello, Placing a smooth walled cone, say for now, a 24" d...

Hello, Placing a smooth walled cone, say for now, a 24" diameter intake x 96" in length that smoothly tapers to an 1-1/2" diameter outlet, (a drogue placed 48" deep at the centerl

Explain the principle of operation of any one type of mosfet, Explain the p...

Explain the principle of operation of any one type of MOSFET. Operating Principle of N-channel Enhancement MOSFET Operating principle of N channel Enhancement MOSFET i

Determine tension in pulley problems, Three equal weights A, B, C of mass 2...

Three equal weights A, B, C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown. Tension in the string connecting weights B and C is approxi

What was the acceleration of the car, Assume a car rolls down a 52.0-m-long...

Assume a car rolls down a 52.0-m-long inclined parking lot and is stopped by a fence. If it took the car 11.25 s to roll down the hill, what was the acceleration of the car bef

Ac, average or mean value of AC

average or mean value of AC

Radioactivity, Why nuclear fission preceeds nuclear fusion?

Why nuclear fission preceeds nuclear fusion?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd