lecture17 - Lecture 17 Slide 1 EECS40 Fall 2003 Prof King...

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Unformatted text preview: Lecture 17, Slide 1 EECS40, Fall 2003 Prof. King Lecture #17 ANNOUNCEMENTS • Reference text (Rabaey et al. ) posted online • Instructions for Linux users posted online OUTLINE • Semiconductor materials • Properties of silicon • Doping Reading Chapter 3.1 (Rabaey) Lecture 17, Slide 2 EECS40, Fall 2003 Prof. King Electrical Resistance where ρ is the resistivity Resistance Wt L I V R ρ = ≡ (Units: Ω ) V + _ L t W I homogeneously doped sample (Units: Ω-cm) Lecture 17, Slide 3 EECS40, Fall 2003 Prof. King What is a Semiconductor? • Low resistivity => “conductor” • High resistivity => “insulator” • Intermediate resistivity => “semiconductor” – Generally, the semiconductor material used in integrated-circuit devices is crystalline • In recent years, however, non-crystalline semiconductors have become commercially very important polycrystalline amorphous crystalline Lecture 17, Slide 4 EECS40, Fall 2003 Prof. King Semiconductor Materials Elemental : Compound : Alloy : Lecture 17, Slide 5 EECS40, Fall 2003 Prof. King The Silicon Atom • 14 electrons occupying the 1st 3 energy levels: – 1s, 2s, 2p orbitals filled by 10 electrons – 3s, 3p orbitals filled by 4 electrons To minimize the overall energy, the 3s and 3p orbitals hybridize to form 4 tetrahedral 3sp...
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This note was uploaded on 08/23/2009 for the course EECS 40 taught by Professor Chang-hasnain during the Fall '08 term at Berkeley.

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lecture17 - Lecture 17 Slide 1 EECS40 Fall 2003 Prof King...

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