In this tutorial we are going to learn about What is Role Buried resistor in PCB ?
A very thin Resistive sheet is laminated between the foil & fr4 for a board layer. Etching is controlled in different passes so that there can be places where both the foil & the resistive sheet are etched, as well as places where the foil but not the resistive sheet are etched.
Buried resistance is The alloy is laminated to a dielectric and subtractively processed to produce planar resistors. so that that it has the thin film nature, it can be buried within layers – without increasing the thickness of the board or occupying surface space (like discrete resistors). It is made by special design in PCB which has resistance is 65 OHM.
What is benefit of burreid resistance in PCB design
- When we use in PCB design then it can Improves line impedance matching.
- When we use in PCB design then it can Reduces signal paths & series inductance.
- When we use in PCB design then it can Reduces cross talk, noise and EMI.
- When we use in PCB design then it can Enhances performance of cost-effective resistor technology in high speed high density circuit layout.
Advantage of burreid resistance
- It can instead of Eliminates discrete resistors.
- Buried resistance are Lead free compatible.
- Buried resistance are Stable through a wide frequency range 20+Ghz.