  The LSST focal plane consists of 21 autonomous modules ("Raft Tower Modules",
RTM), each of which contains nine thick, fully-depleted 4K x 4K CCDs with
associated control and readout electronics. To enable LSST's repetitive
short-exposure cadence while maintaining high duty factor and low read noise,
the readout is highly parallelized into 3024 independent video channels (16 per
CCD, 144 per RTM). Two vendors supplied the LSST sensors; the devices have
compatible mechanical and electrical interfaces and meet the same electro-optic
specifications, but each RTM is constructed with sensors from a single
supplier. The full complement of rafts were assembled at Brookhaven National
Laboratory during January 2017 - March 2019. Each unit underwent extensive
electro-optic and metrology characterization at operating temperature, the
results of which are presented here along with a discussion of uniformity and
stability.
