An Eaton company confirmed plans to add 400 new jobs in Springfield. Eaton-based manufacturer Silfex Inc. is planning a second location in Springfield, company officials announced Wednesday, with up to 400 jobs coming over five years, as I reported yesterday. The Ohio Tax Credit Authority voted Wednesday to offer the company an incentive, though the company is still working on some final steps to commit to the project. “This is an exciting time for Silfex and for the semiconductor industry as…