Seeking Alpha published SMIC Q4 2012 earnings call transcript. The company's CEO, TY Chiu, says:
"The first fab [BSI] chip demonstrated good image quality, the complete BSI process technology is targeted to contribute revenue in 2014. This will serve the market for higher resolution of phone cameras and high performance video cameras."
"Indeed I think the CIS already is a significant portion of our revenue. The CIS, so after – at last year, it is near to between 5% to 7.5% of our revenue coming from the CIS, okay. And BSI, we expect that definitely will enlarge our access to this market. We believe that by fairly 2014, we should have a reasonable amount of our CIS that comes with BSI technology."
The reported annual revenue is $1.7B, thus CIS sales are about $100M. Image sensors are named as one of the main areas that contributed to 2012 revenue growth.