Former AMD chief engineer and US-based Samsung chip designer Jim Mergard is leaving the company to work for Apple, where his expertise on desktop system processors and SoC (systems on a chip) will make him a formidable asset in yet another front in the competition between tech companies: original chip design. Both Apple and Samsung rely increasingly on their own in-house designed chips, though both use technology from ARM as a foundation for their work, which is largely used in mobile devices.