Chip core technology development trend of

Chip core technology development trend of

From domestic and foreign semiconductor lighting power type LED chip technology, the development of the current situation of the film structure, a series of advantages, with its chips will be the future of lighting-class LED chip technology development, an inevitable trend, lighting-class LED chip, the development of the structure will experience a " Formal structure → structure → film structure flip-chip "technology evolution. Table 2 lists the structure of silicon thin-film structures with traditional features of the chip compared to thin film can be seen from the table structure of the chip light-emitting efficiency, heat dissipation and has a tradition of integration and so can not compare the superiority of the chip, which is international plant layout and development of the original intention of competing. Shown in Figure 3 shows the Lumileds, Cree, and Osram three large international companies, has launched a new thin-film structure of products, Cree's EZBright series of packaged white light devices can reach 186lm / W in luminous efficiency, are reported in the current worldwide best.

Of course, the semiconductor lighting LED chip technology is a matter of theory, design, epitaxy and chip technology, the systematic process, in addition to thin-film chip technology, the current world lighting-class LED chip technology for the development, can mainly be attributed to the following technical line :

1) non-polar substrates, semi-polar substrates the epitaxial material growth;

2) quantum dots, quantum-wire active layer design and epitaxial growth;

3) photonic crystals, quasi-photonic crystal chips used in optical technology to take;

4) AC light-emitting diode (AC-LED).