"Although the current LED market into accelerating integration period, but is present in the high-end LED industry products are scarce, and mid-range everywhere and prices are still falling state, and on the enterprise strategy, vertical integration, more and more enterprises begin to existing advantage down continuously, promote the competitiveness of the market." Vice President of lattice lighting Liang Fubo in light on LEDinside said during the exhibition.
As the world's first to achieve industrialization of silicon substrate LED company, lattice in the industry has been quietly walked, and at the beginning of this year's national technology invention award at that time can make crystal fame. Subsequent build jiangxi nanchang optical valley, construct the pull of the billions of LED industry planning, followed by global silicon substrate of lattice LED business partner program started, behind a series of events, crystal seems able to industry's declaration: lattice window of opportunity has come!
Silicon substrate to the vertical structure of LED
"Silicon substrate is, as it were, for the vertical structure of LED." Liang Fubo said.
Why is the silicon substrate for the vertical structure of LED? This should speak of from the vertical structure of LED itself. The small and medium-sized power chip, most of them are sapphire of LED chips, P and N electrode electrode substrate on the same side (figure 1); And the vertical structure is P and N electrode electrode on both sides of the substrate (figure 2). The current practice of sapphire, the vertical structure of LED is the sapphire substrate, stripped, highly reflective materials on the chip at the bottom of the plating after plus thermally conductive substrate material structure. So once the sapphire substrate, certainly will need to adopt laser stripping, this will lead to high yield, low cost, and high temperatures of stripping of LED epitaxial material may have damage.
But the silicon substrate is completely different, not only in growth, substrate cost is far lower than the sapphire material, and chemical etching method can be used to peel substrate, on the efficiency, yield, and reliability, are much higher than laser stripping method must be used in the sapphire substrate. For stripping the silicon substrate, LED a smooth surface is N face directly, also is to single out the light, rather than suits LED five surface light, silicon substrate vertically LED beam focus, directional well.
The more it is worth mentioning that silicon substrate in combination with the white light chip technology in practical manufacturing, also can improve the luminous flux per unit area and the chip surface color uniformity, it may provides the high quality lighting. Adopt ceramic packaging process at the same time, can improve the reliability of products.
Silicon substrate LED product positioning in the high-end market
Liang Fubo said, silicon substrate is LED lattice core competitive advantage and strategy use silicon products hit the high-end market, instead of foreign imports.
At present, the crystal can be roughly divided into silicon substrate LED blue light vertical leds and uv vertical LED series.
Blue vertical LED aim is emerging high margin markets such as automotive lighting, mobile phone flash, these areas need to use high power leds, vertical and this also is the core of the lattice lighting advantage. Among them, automotive lighting, crystal can from the second half of 2015, to today's car headlights and strip lights of a large number of shipments, can make crystal in car headlights market stood her ground, this market is expected to have big breakthrough in the 3 quarter of this year.
In the mobile phone flash market, crystal can currently is one of the largest companies, domestic shipments from 2015 small batch to rise sharply in the first half of this year, the product has been used in zte, huawei, backgammon, millet, hammer and VIVO domestic high-end mobile phone brands. Liang Fubo introduction: "we have a very professional mobile phone flash r&d team, the early stage of the spent a lot of time communication and cell phone manufacturers, design, through factory-examining, now orders start to explosive growth."
Uv LED, according to the understanding of crystal can early start layout, launched as early as 2015, 2015-410 - nm high photosynthetic efficiency UVALED products, mainly used in industrial curing. Industrial curing generally need high power LED, which is in accordance with the technical advantages of the lattice lighting. Liang Fubo said: "since the first half of this year, uv market status in a straight line rise, as one of the important development direction of late lattice lighting, will continue to expand into markets such as sterilization, uv vertical chip proportion is expected to reach 30% 50%."
Liang Fubo confidently said: "silicon substrate of lattice LED products have been mature, we are power has the advantages of market segments, in these markets perfectly, to dance and compete, we are very confident."
