SiliconBlue Technologies has closed on $18 million in Series D financing. Atlantic Bridge, a Dublin and London-based private equity firm, led the financing. Existing shareholders BlueRun Ventures, Crosslink Capital, NEA and Apex Venture Partners all participated in the round. Brian Long, a partner at Atlantic Bridge, will join the company’s board. SiliconBlue develops custom mobile device technology for handheld applications. The company is headquartered in Santa Clara, Calif., with offices in China, Taiwan, Korea, and Japan.