Tata Sons board members, including Venu Srinivasan and Ajay Piramal, took a tour of the facilities of Tata Electronics in Bangalore and Hosur, which is set to become the conglomerate's primary chip-manufacturing vehicle. Tata Electronics hosted the entire Tata Sons brass for its board meeting, where Chairman N Chandrasekaran discussed the future growth plans, top sources aware of the plant visits told ET.