Like you see in the picture, the first thing you will notice is the lead posts. If you have a waterclear casing, you can easily see whats inside. Inside the LED you will find a few interesting things. Today, you can get almost and LED to suit your needs. Later, the high brightness White LED was made by this same man and he received many awards. He used a combination of different materials to create this LED. The first High Output blue LED was created by Shuji Nakamura of Nichia Corporation in 1993. Later on down the track, companies use different materials other than GaAs and produced different colours. Jean Hoerni at Fairchild Semiconductor and innovative packaging, optoelectronics pioneer Thomas Brandt led the team at Fairchild semiconductor and they were successfully producing LEDs for low prices. In 1970 Fairchild Optoelectronics ( with the help of Fairchild semiconductor) manufactured the LED for only 5 cents! Using the planar process invented by Dr. Hp used them in their calculators instead of LCD screens. In that same year, HP also mass produced LEDs with the GaAs (gallium arsenic) that Monsanto supplied them with. A company by the name of the Monsanto Company first mass-produced these red LED indicators using the Gallium Arsenic that was used before. Back then LEDs were horribly expensive costing $200 a unit. The first visible spectrum LED was made in 1962 by Nick Holonyak Jr in GE electronics. They received a patent for the LED and they were introduced to the world. This is a material that consisted of gallium and arsenic.

Two Texas instrument experimenters made the first infra-red light produced by a single piece of Gallium arsenide.

however the LED was not fully introduced. A voltage was applied and light was produced in the form of electro luminescence. He experamented with a single peice of the element, silicon (which i will explain later) and a cat's whisker detector which consisted of a thin peice of wire that connected to the anode and the base of the semiconductor connected to a cathode. This was experamented in 1907 by a experamenter by the name of H.J Round in Marconi Labs in England. The technology of LEDs started with electroluminescents.

Smd led anode cathode