Target Technology filed suit earlier this month, seeking damages for alleged patent violations related to Sony’s Blu-ray technology, which is used in the PS3 system.

The suit, which names Sony Computer Entertainment America, Sony Pictures and Sony DADC, claims that products marketed under the Blu-ray name infringe on a patent Target owns for reflective-layer materials in optical discs. The patent addresses what Target called a need for specific types of silver-based alloys with the advantages (but not the price) of gold. According to the patent, the alloys are also more resistant to corrosion than pure silver.