  The Cherenkov Telescope Array (CTA) Consortium is developing the new
generation of ground observatories for the detection of ultra-high energy
gamma-rays. The Italian Institute of Nuclear Physics (INFN) is participating to
the R&D of a possible solution for the Cherenkov photon cameras based on
Silicon Photomultiplier (SiPM) detectors sensitive to Near Ultraviolet (NUV)
energies. The latest NUV-HD SiPM technology achieved by the collaboration of
INFN with Fondazione Bruno Kessler (FBK) is based on
$30\mu\mbox{m}\times30\mu\mbox{m}$ micro-cell sensors arranged in a
$6\times6\;\mbox{mm}^2$ area. Single SiPMs produced by FBK have been tested and
their performances have been found to be suitable to equip the CTA cameras.
Currently, INFN is developing the concept, mechanics and electronics for
prototype modules made of 64 NUV-HD SiPMs intended to equip a possible update
of the CTA Prototype Schwarzschild-Couder Telescope (pSCT) telescope. The
performances of NUV-HD SiPMs and the design and tests of multi-SiPM modules are
reviewed in this contribution.
