Written by Artem Oppermann Published on Feb. Transistors serve as the basic building blocks of modern electronics. A bipolar junction transistor lets a small current be injected at one of its terminals to control large amounts of current flowing between the other two terminals. Several fabricated SETs show a similar Coulomb blockade at 4 K, demonstrating reasonable yield for the process. A transistor is a semiconductor that amplifies or switches electronic signals. Frequently Asked Questions FAQs What is Bipolar Junction Transistor A bipolar junction transistor is a single silicon component where electrons and holes are used as charge carriers. The observed anomalies, such as missing and split diamonds in the charging plots and random telegraph signals, suggest that the donor sites play an important role in the device operation. The SET’s charging diagram indicates a charging energy of around 20 meV, credited to its small tunnel junction size as well as possible “puddle” formation from the dopant distribution within the island and the leads. The electrical conductivity of a semiconductor is between that of a good conductor (like copper) and that of an insulator (like rubber). Degenerately doped amorphous silicon is deposited into the pit to form the SET island, the overburden of silicon is removed, and the structure is thinned down by chemical mechanical polishing. It is a material that has much lower resistance to the flow of electrical current in one direction than in another. A pit in this line is formed by a highly selective silicon dry etch, and the tunnel oxide is grown on the sidewalls of the pit using rapid thermal oxidation. A thin ( ∼ 15 nm ) line of degenerately doped silicon on insulator is embedded in a planarized plasma enhanced chemical vapor deposition oxide through nanoencapsulation. A semiconductor is a material that has certain unique properties in the way it reacts to electrical current. The authors report the results of a novel single electron transistor (SET) fabrication technique that combines the unique advantages of chemical mechanical polishing and the versatility and scalability of silicon processing.
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