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White light emitting diode package having enhanced white lighting efficiency and method of making the same
White light emitting diode package having enhanced white lighting efficiency and method of making the same
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机译:具有提高的白色照明效率的白色发光二极管封装及其制造方法
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摘要
A white light emitting diode (LED) package with multilayered encapsulation structure and the packaging methods are disclosed. The white LED package structure includes metal electrodes, a heat dissipation base, a PPA plastic for fixing the electrodes and the heat dissipation base together, at least one LED die, a die attaching material, gold wires for electrically connecting the LED die to the electrodes, a first type of silicone encapsulant, a second type of silicone encapsulant, and a phosphor containing layer. The invention utilizes a low-refractive index silicone (the second type of silicone encapsulant) to separate the phosphor containing layer away from the first type of silicone, which covers the LED die, to prevent/reduce emitted light going backward and hitting the LED die.
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