HTC is out a top executive with the departure of chief innovation officer Horace Luke. The exec has been gone for some time now, having exited at the end of April. The Taiwanese phone maker formally announced the news this week, citing "personal reasons" as the motivation behind the CIO's exit. HTC had nothing but kind words for Luke, who had been with the company since 2006, stating that he had "nurtured a culture of innovation." The company's vice president of design, Scott Croyle, has stepped into the Luke's vacant position.