Interplex Quantum, formerly Quantum Engineering, was established in 2004 and provides die casting services utilizing aluminum, and zinc alloys. The company specializes in thin-walled, complex-shaped components requiring decorative surface finishes. Located just outside of Seoul, Korea, Interplex Quantum has a broad range of experience supplying products that require decorative finishes such as electroplating, electrodeposition, anodizing, PVD and shiny metallic spray. Interplex Quantum's extensive expertise in die casting alloy development expertise allows the company explore new alloys to support various applications including cell phone and mobile device housings, sliding hinge modules, rotating hinge modules, brackets, and heatsinks. As part of Interplex Industries, Interplex Quantum can support a complete die casting solution on a global basis.

Interplex is also the developer of IK500, a new high-strength aluminum alloy.