摘要：倒装封装工艺与平面涂覆工艺以及全角度立体发光的特点是LED倒装灯丝成为市场研究重点的原因。LED灯丝的光、色、电、热等性能的研究一直是国内外LED行业研究的重点。本文首先对倒装120mmLED灯丝的封装工艺进行了研究，包括支架结构，芯片排布，固晶及点胶工艺等。而后重点对灯丝的光、电、色、热等方面的性能进行了系统的研究。具体的研究内容主要有:第一，不同直流电流驱动下倒装LED灯丝的光通量、光效、色温、显色指数以及色坐标等参数的变化规律。第二，比较初态及稳态情况下光度学及色度学参数的变化。第三，利用FloEFD热学模拟软件对灯丝的热分布情况进行了模拟，并与实测结果进行了比较，并分析了温度对光色性能的影响。最后利用频闪老化及长时间点亮老化对120mm灯丝的可靠性进行了分析和研究。61846

毕业论文关键字： LED   倒装灯丝  封装  可靠性  

120mm long Optical flip-filament package design and Thermal Performance Analysis

Summary:

Flip-chip packaging technology with flat coating process and luminous three-dimensional perspective of the whole feature is the reason LED flip filament serve as market research priorities. Study filament LED light, color, electrical, thermal and other properties of the LED industry at home and abroad has been the focus of the study. This article first flip 120mmLED filament assembly process were studied, including the support structure, the chip arrangement, solid crystal and dispensing processes. Then focus on the performance of optical, electrical, color, heat and other aspects of the filaments were studied. Specific contents are: First, under different DC-driven LED flip filament luminous flux, luminous efficiency, changes of color temperature, color rendering index and color coordinates and other parameters. Second, the change in the initial state and at a relatively steady state photometric and colorimetric parameters. Third, the use FloEFD thermal simulation software for heat distribution filament is simulated and compared with the measured results were compared and analyzed the properties of light color temperature. Finally, the use of strobe lights of aging and the aging of the 120mm long filament reliability analysis and research.

Keywords: LED flip chip package reliability filament

1  LED灯丝封装工艺 7

1.1支架的选择 7

1.2固晶 8

1.2.1固晶材料的要求 8

1.2.2固晶操作及注意事项 9

1.3烘烤工艺 13

1.4点胶工艺 13

1.4.1硅胶的选择 13

1.4.2荧光粉的选择 14

1.4.3点胶工艺及要求 14

1.5测试 17

2  120mm长倒装灯丝的光、电、色性能分析 18

2.1 灯丝光、电、色参数的测量 18

2.2 灯丝光学性能研究 21

2.2.1 光通量随电流的变化 21

2.2.2 光效随电流的变化 22

2.3 灯丝色度学性能研究 24

2.3.1 灯丝的显色性研究 24

2.3.2 灯丝的色温研究 26

2.3.3 灯丝的色坐标研究 27