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What is the antenna effect and how to avoid it?

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vreddy

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antenna?

can anyone brief wat exactly antenna effect is? & how to avoid it??

Thankx in advance
 

antenna?

In fabrication, during processes like plasma etching and ion implantation , its possible for the ions to get accumulated. Uncontrolled discharge of these ions can damage the gate oxide leading to failure of transistor. To overcome these, jumper diodes r used.

correct me if i'm mistaken about this.

Added after 10 minutes:



this explains it better
 

    vreddy

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Re: antenna?

hi,

In the fabriction of a chip as the higher metal layers are being deposited ,due to process effects such as etching,ion implantion,some of the ion get collected at the interface of the successive oxide layers.As these layers grow in number ,there will be path existing between gate and higher metal layer ,when a sudden electric discharge takes place.Gate oxides break down.


Remdies to avoid antenna efect:

1 .Reverse bias diodes placed near gate oxides .
2. Metal hopping as layers change
 

    vreddy

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antenna?

how to check antenna effect in the design & fix it via verificaton tool??
 

Re: antenna?

how can we check the antenna effect practically
is there any method
 

Re: antenna?

u get all different runsets for verification tools.....so one is there for antenna check ......which would give the desired op....and then inserting diodes.....one way to remove antenna effect.........
 

Re: antenna?

Thanks shinde,

but u said one way to remove antenna affect is can insert diodes........can u brief it how u do practically.......???

I know there r 2 wayz to remove antenna affect:----
1. metal layer hoping
2. insert reverse biased diodes at the source or drain end

but how the 2nd will be possible practically..???
 

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