Review_exam1 - Thomas J Watson School of Engineering and...

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Thomas J. Watson School of Engineering, and Applied Science Department of Electrical and Computer Engineering EE 332 Semiconductor Devices Name: ______________________ February 13, 2003 First Exam, Spring 2004 This exam is closed book, closed notes, one sheet (one side) of equations allowed. All work must be shown for credit, and equation sheet must be turned in with exam. Questions 1 through 8 are worth 5 points each, and question 9, 10, and 11 are worth 20 points. 1. A specimen of silicon has a donor concentration of 5 × 10 15 cm -3 and an acceptor concentration of 2 × 10 15 cm -3 . What is the equilibrium hole concentration at 300K? 2. The diamond crystal structure has two interpenetrating lattices. Which type of cubic lattice forms each of the interpenetrating lattices? 3. Write D or A next to the following elements to indicate if they would be donor or acceptor atoms in a Si lattice. a) Boron ________ b) Phosphorous ________ c) Arsenic ________ d) Aluminum ________ e) Antimony ________ 4. The wavelength of a light source is 550 nm. What is the energy in eV of the light quanta emitted by this source?
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