 Posted: Wed 9:17, 23 Mar 2011 Post subject: LED writing boards or electronic message s |
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| yan su? a tank, to prevent the chip temperature gradient caused by local thermal stress, and the variation of etching rate, the current high-temperature phosphoric acid wet chemical etching sapphire substrate thickness can be precisely controlled 1.9lusm0.1μm, the etching rate for the second 27.5 lusm 0.5 a.led sign v.? n reduced the rate of temperature control: before etching the wafer with pre-heating and cooling etch designate the design of the wafer can be avoided because of the rapid? n drop the temperature of the fragments produced by thermal shock.
vf increased. pi according to various characteristics of the territory of the chip show that the following 20ma, neon sign various gan-based led chips are linear pi characteristics of the two mosaic map of the chip size and 350μm & time350μm diagonal layout diagonal electrode chip in less than 30ma the pi characteristics ofessentially the same, when the current is larger, the chip size of a large optical power is greater than the small size of the chip. another 350μm & time350μm p diagonal wire electrodeaway from the territory of the diagonal electrode chip n electrodes, in the normal operating current (<30ma) under high optical power, but the current power saturation faster. the luminous efficiency will reach 120 ~ 130lm / w or more; inindoor lighting / lighting products, the product of light efficiency will reach 100lm / w or more, the unit cost reduced by at least 40% than it is now. in addition, with the increase involume of business and project technology products on the rise, 2010, led message board companies in the "863 project - power type led lighting device of the module" project in product expansion, 180 jobs have been added , forming an annual output of 10 million sets of led light source / light industrial scale. |
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