Recently, in Infineon Technologies AG v. Volterra Semiconductor Corp., C.A. No. 10-47 (GMS) (D. Del. Jan. 13, 2011), Chief Judge Sleet granted a stay a District of Delaware case in light of a related case pending in the Northern District of California. The cases are related in that the patent at issue here is a “key invalidity reference” in the Northern District of California case.