The Patent Trial and Appeal Board determined that challenged claims of Harbor Island Dynamic LLC’s patent that relates to the field of isolation region formation in semiconductor substrates are unpatentable as anticipated by or obvious over prior art, in an inter partes review by Samsung Electronics Co. Ltd. and Samsung Electronics America Inc. The board determined that the challenged claims are anticipated by or obvious over prior art that relates to forming isolation regions in semiconductor substrates, to a technique effectively applied to a semiconductor device having a hetero-junction bipolar transistor HBT, and to bipolar transistors and semiconductor diodes that ...