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 and aerospace systems. Its ability to form reliable, fatigue-resistant joints makes it valuable in microelectronics and flip-chip packaging.

Additionally, indium is employed in nuclear medicine as a radioactive tracer and in certain specialized mirrors and coatings where its unique reflectivity and corrosion resistance are advantageous.