  In recent years, the performance of Scientifc Complementary Metal Oxide
Semiconductor (sCMOS) sensors has been improved signifcantly. Compared with CCD
sensors, sCMOS sensors have various advantages, making them potentially better
devices for optical and X-ray detection, especially in time-domain astronomy.
After a series of tests of sCMOS sensors, we proposed a new dedicated
high-speed, large-format X-ray detector in 2016 cooperating with Gpixel Inc.
This new sCMOS sensor has a physical size of 6 cm by 6 cm, with an array of
4096 by 4096 pixels and a pixel size of 15 um. The frame rate is 20.1 fps under
current condition and can be boosted to a maximum value around 100 fps. The
epitaxial thickness is increased to 10 um compared to the previous sCMOS
product. We show the results of its frst taped-out product in this work. The
dark current of this sCMOS is lower than 10 e/pixel/s at 20C, and lower than
0.02 e/pixel/s at -30C. The Fixed Pattern Noise (FPN) and the readout noise are
lower than 5 e in high-gain situation and show a small increase at low
temperature. The energy resolution reaches 180.1 eV (3.1%) at 5.90 keV for
single-pixel events and 212.3 eV (3.6%) for all split events. The continuous
X-ray spectrum measurement shows that this sensor is able to response to X-ray
photons from 500 eV to 37 keV. The excellent performance, as demonstrated from
these test results, makes sCMOS sensor an ideal detector for X-ray imaging and
spectroscopic application.
