Exercise 2.6-1

All Quick Questions / Class Exercises to

2. Semiconductor Materials and Products

	Subchapter 2.1: General Chemistry and Structure
		Ponder the history of "LCD" flat panel displays.
		Why does the world need saving? How shall it be done?
		Why do we use crystals, preferably single crystals, preferably "perfect" single crystals in case of doubt?
		Supply examples for critical parameter - component couplings.
		What makes a semiconductor interesting for technology?
		How would you like your bandgap, Sir?
		What does it mean to dope a semiconductor in reality?
		Come up with 2 - 3 examples where product requirements transfer to shape / structure requirements.
		Can you still afford it if your present product is hugely successful? - What could that mean?
		Provide examples (and criteria) for the products listed

	Subchapter 2.2: Silicon
		What is the approximate lateral size of one transistor in an IC?
		Why are there no 16 GB memory chips now.?
		What properties should a semiconductor have for making IC's?
		What exactly produced complexity and market growth rates of 30 % for more than 30 years (for Si IC's)?
		Where will it end?
		What do you know about MEMS?
		Are there any other uses of Si you know off (or can find quickly)?

	Subchapter 2.3: III-V Semiconductors
		What band gaps of which type would we like to have for III-V properties?
		What are the requirements for substituting light bulbs by LED's? Compare your answers to the list in the script.
		What are the requirements for substituting light bulbs by LED's? What is the state of the art?
		Amend and discuss the list of optoelectronic products given so far.

	Subchapter 2.4: Other Semiconductors and Products
		What are the strengths an weaknesses of Ge?
		Why is SiC both very desirable and very difficult as a semiconductor material?
		What are II-VI semiconductors and chalcogenides= Why are these materials of some interest?
		Name at least two important semiconductors of the above groups and what they are used for.
		What are organic semiconductors and their important uses?

2.6.1 Summary to 2. Semiconductor Materials and Products

© H. Föll (Semiconductor Technology - Script)