Infineon claims that certain DRAM semiconductors and products of Elpida infringe four of Infineon's patents covering key inventions in semiconductor processing and device manufacturing. Although the claims are related to process technologies, Infineon claims that only certain devices include those techniques, hence, it is highly likely that the chips are made using the so-called buried wordline process tech, which is essentially an evolution of the deep trench fabrication technology, and which was used to be exclusive for Qimonda. At present, hardly anyone uses trench technology to manufacture DRAM at the processes below 90nm.

Is Infineon the next Rambus?