Journal
INFRARED PHYSICS & TECHNOLOGY
Volume 123, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.infrared.2022.104173
Keywords
Terahertz; Schottky Barrier Diode; T-shaped contact; InP; Polymer film
Categories
Funding
- National Natural Science Foundation of China [61871072]
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This paper reports a high-performance submicron InP Schottky Barrier Diode (SBD) with a theoretical cut-off frequency of 9.0 THz. The Schottky contact, achieved through a photoresist laminate and gradient exposure process, has a minimum diameter of 0.2 pm. The quality of the contact is improved by surface treatment and high-temperature passivation with a polymer film, resulting in an ideal factor between 1.2 and 1.4.
A high-performance terahertz InP Schottky Barrier Diode (SBD) with a submicron T-shaped contact structure featuring a high theoretical cut-off frequency of 9.0 THz is reported in this paper. The Schottky contact with a minimum diameter of 0.2 pm was achieved by photoresist laminate and gradient exposure process, exhibiting a minimum zero-bias junction capacitance is 0.15 fF. The quality of Schottky contact was improved by surface treatment of particles and high-temperature passivation of the edge with a polymer film, with an ideal factor of between 1.2 and 1.4. The high-frequency performance of the diode is further improved due to the small parasitic capacitance contributed by the polymer film dielectric bridge. The terahertz monolithic integration circuit based on this T-shaped contact submicron Schottky has better performance in reducing the circuit dielectric loss, exhibiting a remarkable potential for high-frequency applications.
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