Final answer:
The name given to the areas where P-type materials join N-type materials to form a diode is junction point. When p- and n-type materials are joined, a uniform electric field is generated near the junction.
Step-by-step explanation:
The name given to the areas where P-type materials join N-type materials to form a diode is junction point. When p- and n-type materials are joined, a uniform electric field is generated near the junction. This occurs because electron-donating impurities in the n-type material relocate across the junction to the vacancies in the p-type material, creating a wall of negative charge on the p-side of the junction and leaving behind positive charges on the n-side of the junction. This results in the formation of a diode.