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PCB with burried capacitance and the type of dielectric mat

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dmd4raj

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How to design a PCB with burried capacitance and the type of dielectric materials used for the design....pls let me know how to implement this and how to guide the fabrication unit and what are the parameters that should be given to FAB house..

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Rajan.k
 

Re: Burried capacitor in PCB

your board fabricator should have all that information.
 

Burried capacitor in PCB

Hi,
If you have for example a multi layer board, usually you can apply between two layers (GND & some supply voltages)a very thin internal layer (basic material of for ex.) 100um thickness, and calculate as a normal capacitor with plate surface of Xcm x Ycm & distance (thickness of dielectricum) 100umeter...
Epsilon-rel is of FR4 (typical_hell brown_ PCB material) so at 4.5, you will realize: its value is not so high_may be par teens to hundred picofarad.
K.
 

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