26. The Journey of a Microchip: Making Semiconductors

1. According to the essay, what is the foundational material used to create silicon wafers?
1. Phosphorus and boron
2. Purified silicon from sand
3. A light-sensitive photoresist
4. A single, complex microchip
The fabrication process must occur in a clean room primarily because:
1. The silicon wafers need to be kept at a very high temperature.
2. The process of doping requires a sterile environment.
3. Even a tiny speck of dust has the potential to destroy a chip.
4. It is where the silicon cylinders are sliced into wafers.
The technique of "photolithography" is most similar to which of the following analogies from the text?
1. Slicing a crystal cylinder into thin discs
2. Shining a light through a stencil
3. Adding impurities to the silicon
4. Packaging individual chips for use
What is the stated purpose of the "doping" stage in the process?
1. To slice the large silicon crystal into thin wafers.
2. To remove unwanted material and create precise circuit lines.
3. To change the silicon's electrical properties to form transistors.
4. To spread a light-sensitive chemical over the wafer.
The essay primarily describes the process of making a microchip as a journey from:
1. A clean room to a supercomputer.
2. A simple switch to a complex circuit.
3. Raw sand to a finished, packaged chip.
4. A large wafer to thousands of individual chips.