Bologna / 04_TCAD_laboratory_pn_junction_GBB_20150223H1655

Uniform doping: resistors (2)

•IV characteristics is linear

•Click on n34 node  click on “eye” button  Inspect (All Files…)

•Select n34_des.plt dataset  p_contact  OuterVoltage  To X-Axis  TotalCurrent  To Left-Y-Axis

no junction  uniform material

mobility field-independent

carrier concentration field-independent

 linear I-V characteristics

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Uniform doping: resistors (3)

•Select the node n34  click on the “eye” button  Sentaurus Svisual (Select

File …)  n34_000019_des.tdr  new S-Visual instance  Ok

• Select Precision cuts  Create cuts  Plot Band Diagram  Ok

• Window  deselect Plot_n34_000017_des

Spatial uniformity  no junctions  no space-charge regions  no diffusion  only drift

= =

No space charge yields (from

Poisson’s equation) constant which means constant and thus linear. Then, since at the boundary

(contacts) we assume equilibrium conditions which imply = , the only possibility is linear = .

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Bibliography

•J.M. Rabaey, A. Chandrakasan, B. Nikolic, Digitial Integrated Circuits: A Design

Perspective, Prentice Hall, 2003.

•Giovanni Ghione, Dispositivi per la Microelettronica, McGraw-Hill, 1998.

•Sentaurus Synopys User’s guides

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