High power LED chip, what is called upside down, what is called a formal dress?
Flip chip electrode: in order to occupy area of light thus affecting the luminous efficiency to avoid installing the chip, the chip R & D personnel to design a reverse structure, namely the dress chip upside down, the light emitting layer excites the light directly from the other side of the electrode (a substrate was eventually stripped, the core material is transparent), at the same time, according to the structure. Convenient welding line for the LED packaging design to the whole chip called flip, flip chip (Flip Chip), the structure in the larger power chip used.
Dress: the earliest chip chip structure, chip structure is widely used in low power chip. The structure of electrode at the top, from top to bottom material: P-GaN, N-GaN, light emitting layer, the substrate. Therefore, it is relatively flip forward;
Electrodes: divided into positive and negative electrodes, collectively referred to as electrodes; polarity: refers to the electrode is positive or negative, is a description of the electrode.
