Reliability characterizations of display driver IC on High-k/ metal-gate technology

Display Driver IC is used to operate the display panel of mobile devices, such as handheld smartphones and tablets. Low power consumption becomes very important in mobile segments, thus High-k (HK)/ metal-gate (MG) process was used to fabricate DDI products. In this paper, an abnormal leakage increase observed during HTOL will be discussed along with the physical mechanism and superb HTOL results after process fixes have been implemented. As result, final DDI product showed an excellent reliability results through 1500hrs of HTOL exceeding product end of life (EOL).