Semiconductor manufacturer Quantance has raised $12 million in a second round of funding. The San Mateo, Calif.-based company develops technology that it says can improve the data speed and battery life of mobile devices using third- and fourth-generation cellular technology. It plans to use this latest cash infusion to make its patented technology commercially available for 3G devices, which is where the company is focusing its business interests. The latest round of funding was led by new investors TD Fund and DoCoMo (NYSE: DCM) Capital contributed as well. Original investors Granite Ventures and InterWest Partners also participated in the round. The company expects to begin shipping its first commercial chipset in the second quarter of 2009. Release.