TEMPE, Ariz.--(BUSINESS WIRE)--Amkor Technology, Inc. (NASDAQ:AMKR), a leading provider of semiconductor packaging and test services, today announced financial results for the first quarter ended March 31, 2015. “First quarter results met our expectations," said Steve Kelley, Amkor's president and chief executive officer. "Sales grew 7% year-on-year driven by strong demand for our advanced packaging and test technologies. We saw a corresponding increase in earnings per share of $0.03 year-on-ye