1, the role of the chip: the chip is the main component of Lamp material, is a light-emitting semiconductor material.
2, the composition of the chip: The chip is composed of gallium phosphide (GaP), gallium aluminum arsenic (GaAlAs) or gallium arsenide (GaAs), gallium nitride GaN) and other materials, and its internal structure has one-way conductivity.
3, LED chip material
The chip welding pad is usually a gold pad or an aluminum pad. The shape of the welding pad is round, square, cross and so on.
The luminous color of the chip depends on the wavelength (HUE), and the common classification of visible light is roughly: Dark red (700nm), dark red (640-660nm), orange red (615-635nm), amber (600-610nm), yellow (580-595nm), yellow-green (565-575nm), pure green (500-540nm), blue (435-490nm), purple (380) -430nm). White and pink light is a mixed effect of light. The most common is a combination of blue yellow fluorescent powder and blue red fluorescent powder.