Chalcogenides, while offering exceptionally favorable optical properties present unique difficulties during the manufacturing and coating process. Featuring amorphous less-robust structures, chalcogenides are markedly different from other infrared materials resulting in low adhesion between the glass and thin-film layers. They are also softer and prone to scratches and other surface-level defects, making it vital to perfect the ability to add protective layers of coating. Creating an extremely durable low stress coating for high-performance infrared (IR) applications has posed a challenge for manufacturers for years. The ideal parameters for achieving a high-performance coating are narrow and can be notoriously difficult to achieve, particularly when you attempt to coat chalcogenides with Diamond-Like Carbon (DLC) for specific applications.