With Wistron's iPhone manufacturing unit in Kolar being taken over by Tata, it is likely to set up an assembly, testing, marking and packaging (ATMP) plant there, according to a state industries department official. ATMP plays a major role in the semiconductor industry's ecosystem. Once a chip is printed, it must be tested and packaged before it can be shipped to manufacturers. The planned investment by Tata for its semiconductor unit is in sync with the Karnataka government's initiatives to shore up industrial development in the state.