CIGS thin-film start-up DayStar has appointed Magnus Ryde its new chief executive officer and a director of the company's board. DayStar also announced that William Steckel resigned from his positions of CEO and CFO on February 15. Steckel will continue to serve on DayStar's board. Ryde was North American President of the leading semiconductor foundry, Taiwan-based TSMC. He also spent 18 years with KLA-Tencor in various executive roles. DayStar has had a string of executive changes over the past two years.