SAN FRANCISCO — In the hot seat over accusations they leaked a confidential Apple business record, Samsung’s lawyers at Quinn Emanuel Urquhart & Sullivan aren’t getting a break from U.S. District Judge Lucy Koh.

In an order issued Tuesday evening, Koh backed the approach taken by U.S. Magistrate Judge Paul Grewal and said Samsung and the Quinn team must explain their apparent mishandling of confidential information turned over by Apple during discovery.