Sony facing Blu-ray patent suit

California-based Target Technology is suing Sony Computer Entertainment America, Sony Pictures and Sony DADC US over alleged patent infringement. 

Target Technology designs and supplies corrosion-resistant thin film alloys for optical disc applications.

Sony is accused of "wilfully and deliberately" infringing on Target's patents with its new high definition Blu-ray discs by making use of a highly-reflective silver alloy material developed by Target founder, Han Nee.

The patent was filed in April 2004 and granted in March 2006. It is used in the majority of DVDs sold in the market today.

Target is seeking a jury trial and is requesting a "permanent injunction preventing Sony from violating its patent rights in the future, as well as damages with interest".

Sony's US office has declined to comment on the case and Target had not responded to a request for comment at the time of publication.

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