LOS ANGELES, Nov. 20 -- DMG Technologies, a manufacturer of optical subassemblies used in telecomm, datacomm, CATV and instrumentation systems, and Adtech Technologies, a designer of semiconductor-based optoelectronic devices, today announced they have formed a partnership to establish Netchip, a Los Angeles-based optoelectronics semiconductor foundry. Netchip will initially produce distributed feedback, Fabry-Perot and coarse wavelength division multiplexing (CWDM) lasers, as well as avalanche photodiodes. 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