Challenged claims of Bell Semiconductor LLC’s patent that discloses a method of making a leadframe and a method of making a semiconductor device using the leadframe are unpatentable as anticipated by and obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Advanced Semiconductor Engineering Inc. The board said that the challenged claims are anticipated by and obvious over prior art that relates to the production of resin-sealed semiconductor devices; and directed to a method of manufacturing a highly accurate lead frame, in particular a lead frame having a thin-walled flat portion at ...
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