Indium is widely used in the electronics industry, particularly in the production of transparent conductive coatings for touchscreens, liquid crystal displays (LCDs), and organic light-emitting diodes (OLEDs). It is a key component of indium tin oxide (ITO), a material that combines high electrical conductivity with optical transparency, making it ideal for flat panel displays and solar cells.

In semiconductor applications, indium is used to create compounds like indium phosphide and indium antimonide, which are essential in high-speed electronics, infrared detectors, and laser diodes. It also serves as a thermal interface material in high-performance computing and optoelectronic devices due to its excellent heat transfer properties.

Indium is used in soldering and bonding applications, especially in low-temperature alloys for cryogenic systems and in the assembly of sensitive electronic components where thermal stress must be minimized. Its ability to form reliable, ductile joints makes it valuable in aerospace and defense technologies.

Additionally, indium is employed in nuclear medicine and radiation detection, where certain indium compounds serve as tracers or are used in imaging devices. It also finds niche uses in mirror coatings and gaskets for vacuum systems due to its softness and ability to create tight seals.