Having investigated the characteristics of extrinsic N-type and P-type materials in the prior chapter, we shall continue by examining what happens when the these two materials are combined into a sing...Having investigated the characteristics of extrinsic N-type and P-type materials in the prior chapter, we shall continue by examining what happens when the these two materials are combined into a single device. In fact, it is quite possible to have a region of one type completely embedded within a region of the opposite type as we shall see in later chapters. By creating a single zone of N material adjacent to a zone of P material, we wind up with the PN junction.
