(February 19, 2016, 2:51 PM EST) -- SAN FRANCISCO — A shareholder filed a securities class action complaint in California federal court on Feb. 18, seeking to halt a company’s proposed merger until the details of the merger plan are disseminated to stockholders as a result of the defendants’ alleged misstatements made in the merger plan documents (Brent Talbert v. Mattson Technology Inc., et al., No. 16-0811, N.D. Calif.)....