I want to know the answer to the following question:
What is the name for a layer of n-type semiconductor set between two p-type semiconductors?
All the background I'm provided with is that "The bipolar junction transistor, the first type of transistor to be mass-produced, is a combination of two junction diodes, and is formed of either a thin layer of p-type semiconductor sandwiched between two n-type semiconductors (an n–p–n transistor), or a thin layer of n-type semiconductor sandwiched between two p-type semiconductors (a p–n–p transistor).". Is that enough to answer the question?
Answer: yes