By Michael Gold TAIPEI (Reuters) – Taiwan Semiconductor Manufacturing Co Ltd (TSMC) reported its 8th straight quarter of profit growth, as the worlds largest contract chip maker booked wider profit margins following a boost in demand from mobile device manufacturers. Asias 10th biggest company by market value has been able to consistently profit thanks to the spread of smartphones and its ability to produce a high degree of defect-free chips compared with rivals such as Intel Corp, Samsung Electronics Co Ltd and GlobalFoundries, industry watchers say. That helped net profit rise 21 percent to T$47.9 billion ($1.59 billion) in January-March, the company said in a statement on Thursday. That compared with the T$43.2 billion mean estimate of 19 analysts polled by Thomson Reuters.