TA-CON-2017-037

The charm spectrum is still not completely understood. This talk intends to summarize the most interesting experimental results in open charm physics, achieved by the past e+e- experiments, and show some new theoretical developments, in particular for Ds mesons. After the observation of the Ds2317, more than 10 years ago, still questions remain opened due to the poor knowledge of experimental results. The measurement of the width of narrow states below the D(*)K threshold in this respect is essential for a better understanding: a technique to measure it will be shown, and an overview on new future facilities where this measurement can be achieved will be given. In particular, we will focus on the role of the future PANDA experiment at FAIR, and the original contribution of this project in the measurement of the Ds(*) very narrow width.