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    • 4. 发明授权
    • Light emitting diode
    • 发光二极管
    • US06265732B1
    • 2001-07-24
    • US09452057
    • 1999-11-30
    • Hiroshi NakatsuTetsuroh MurakamiHiroyuki HosobaTakahisa Kurahashi
    • Hiroshi NakatsuTetsuroh MurakamiHiroyuki HosobaTakahisa Kurahashi
    • H01L2715
    • H01L33/30H01L33/0025
    • A light emitting diode includes a substrate, a light emitting layer, a first cladding layer having a first conductivity type and an energy gap greater than an energy gap of the light emitting layer, a second cladding layer having a second conductivity type and an energy gap greater than an energy gap of the light emitting layer, and an intermediate barrier layer having the same conductivity type as the conductivity type of the light emitting layer but different from the conductivity type of the first or second cladding layer, and having an energy gap less than the energy gap of the first or second cladding layer but greater than the energy gap of the light emitting layer. The light emitting diode has a double heterostructure such that the light emitting layer is interposed between the first and second cladding layer. The intermediate barrier layer is disposed between the light emitting layer and the first cladding layer and/or between the light emitting layer and the second cladding layer.
    • 发光二极管包括基板,发光层,具有第一导电类型的第一包层和大于发光层的能隙的能隙;第二覆层,具有第二导电类型和能隙 大于发光层的能隙,以及具有与发光层的导电类型相同的导电类型但不同于第一或第二包层的导电类型的导电类型的中间阻挡层,并且具有较小的能隙 比第一或第二包层的能隙大,但大于发光层的能隙。 发光二极管具有双重异质结构,使得发光层介于第一和第二包覆层之间。 中间阻挡层设置在发光层和第一包层之间和/或在发光层和第二包层之间。