Resumen: We report on the development of Mo/Au based transition edge sensors (TESs) aimed at soft X-ray detection. TESs of different sizes with Tc ~ 100 mK and very narrow transitions have been fabricated. Dark characterization based on I-V, complex impedance, and noise measurements has allowed us to obtain their basic functional parameters at different bath temperatures and operating points. Electrodeposited Bi films, to be used as X-ray absorbers, have been developed and characterized. Idioma: Inglés DOI: 10.1109/TASC.2016.2637337 Año: 2017 Publicado en: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 27, 4 (2017), 2101505 [5 pp] ISSN: 1051-8223 Factor impacto JCR: 1.288 (2017) Categ. JCR: PHYSICS, APPLIED rank: 104 / 146 = 0.712 (2017) - Q3 - T3 Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 180 / 260 = 0.692 (2017) - Q3 - T3 Factor impacto SCIMAGO: 0.408 - Electrical and Electronic Engineering (Q2) - Electronic, Optical and Magnetic Materials (Q3) - Condensed Matter Physics (Q3)