Semiconductor Materials: Bands, Doping and Devices
Build the minimum materials framework behind semiconductor behaviour and fabrication.
Band structure
The separation between valence and conduction states controls whether a material acts as conductor, semiconductor or insulator.
Doping
Small concentrations of donor or acceptor atoms control carrier type and concentration. Uniformity and activation are crucial.
Defects and interfaces
Dislocations, vacancies, impurities and interface states trap carriers or increase leakage and variability.
Manufacturing precision
Crystal growth, oxidation, deposition, lithography, etching and annealing must control dimensions and contamination at extreme scales.
Engineering takeaway
Device performance emerges from electronic structure plus extraordinarily controlled defects, interfaces and processing.