Semiconductor Manufacturing International Corp. , China's largest foundry, said Wednesday that it expects to make its first sales of 28nm products by the end of this year. The company will start commercial production of its most advanced technology node in the third quarter and expects its first revenue contribution from 28nm in the fourth quarter of 2015, SMIC CEO Tzu-Yin Chiu said on a conference call to announce the company's second-quarter results.