(September 21, 2017, 3:56 PM EDT) -- ALEXANDRIA, Va. — In a Sept. 20 request for inter partes review, two petitioners took aim at a patented method of integrated circuit manufacturing including the formation of selectively sized spacers (Renesas Electronics Corporation and Renesas Electronics America Inc. v. Lone Star Silicon Innovations, No. IPR2017-02124, PTAB)....