  The dual-phase xenon time projection chamber (TPC) is a powerful tool for
direct-detection experiments searching for WIMP dark matter, other dark matter
models, and neutrinoless double-beta decay. Successful operation of such a TPC
is critically dependent on the ability to hold high electric fields in the bulk
liquid, across the liquid surface, and in the gas. Careful design and
construction of the electrodes used to establish these fields is therefore
required. We present the design and production of the LUX-ZEPLIN (LZ)
experiment's high-voltage electrodes, a set of four woven mesh wire grids. Grid
design drivers are discussed, with emphasis placed on design of the electron
extraction region. We follow this with a description of the grid production
process and a discussion of steps taken to validate the LZ grids prior to
integration into the TPC.
