The maximum depletion layer width in Silicon is 

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ESE Electronics 2014 Paper 2: Official Paper
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  1. 0.143 μm 
  2. 0.857 μm
  3. 1 μm
  4. 1.143 μm

Answer (Detailed Solution Below)

Option 3 : 1 μm
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F1 P.Y Madhu 9.03.20 D 3

1) When reverse biased, more charge carriers are depleted, resulting in the widening of the depletion region.

2) This increases the opposing electric field for the diffusion carriers and does not allow them to cross the junction, offering a high resistance.

3) If the reverse voltage increases beyond a certain level, the junction breakdown happens, i.e. there is a limit to the depletion width.

4) The maximum depletion layer width in Silicon is approximately 1 μm.

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