高温可靠性测试如高温栅偏(High Temperature Gate Bias,HTGB)、高温反偏(High Temperature Reverse Bias,HTRB)、高温高湿反偏(High Humidity High Temperature Reverse Bias,H3TRB)是器件出厂和寿命评估必备的测试。然而,不同标准的...高温可靠性测试如高温栅偏(High Temperature Gate Bias,HTGB)、高温反偏(High Temperature Reverse Bias,HTRB)、高温高湿反偏(High Humidity High Temperature Reverse Bias,H3TRB)是器件出厂和寿命评估必备的测试。然而,不同标准的测试条件不尽相同,其对应的内在机理也不明确。为讨论测试条件的确定原则,首先从单个和耦合的温度、电场、湿度加速老化模型出发,论述了相关测试标准所用模型,分析了其应用范围和使用原则。进一步地,总结了现有各类标准下的测试条件,计算了电动汽车模块正常运行30年所需HTGB、HTRB、H3TRB加速老化时间分别为832 h、866 h、1038 h,测试的样本数均为70,并指出测试时间、样本数需根据实际工况决定。最后,基于以上分析,提出了一种加速老化时间、样本数可调的高温可靠性测试流程。展开更多
In order to determine the environmental effects on the luminescence properties of a phosphor layer for high-power light emitting diodes, a high humidity and temperature test （85℃/85%RH） and a thermal aging test （8...In order to determine the environmental effects on the luminescence properties of a phosphor layer for high-power light emitting diodes, a high humidity and temperature test （85℃/85%RH） and a thermal aging test （85℃） were performed on silicone/YAG phosphor composites. The luminescence properties of silicone/phosphor composites are monitored by a fluorescence spectrometer. The results show that high temperature could result in an increase in conversion efficiency of composites during the early aging stage and red shift of YAG phosphor; and high humidity could result in a significant decrease in conversion efficiency of composites while having a small influence upon the optimal excitation wavelength of the YAG phosphor.展开更多
文摘高温可靠性测试如高温栅偏(High Temperature Gate Bias,HTGB)、高温反偏(High Temperature Reverse Bias,HTRB)、高温高湿反偏(High Humidity High Temperature Reverse Bias,H3TRB)是器件出厂和寿命评估必备的测试。然而,不同标准的测试条件不尽相同,其对应的内在机理也不明确。为讨论测试条件的确定原则,首先从单个和耦合的温度、电场、湿度加速老化模型出发,论述了相关测试标准所用模型,分析了其应用范围和使用原则。进一步地,总结了现有各类标准下的测试条件,计算了电动汽车模块正常运行30年所需HTGB、HTRB、H3TRB加速老化时间分别为832 h、866 h、1038 h,测试的样本数均为70,并指出测试时间、样本数需根据实际工况决定。最后,基于以上分析,提出了一种加速老化时间、样本数可调的高温可靠性测试流程。
基金Project supported by the Key Project of the National Natural Science Foundation of China(No.50835005)the National High Technology Research and Development Program of China(No.2009AA03A1A3)
文摘In order to determine the environmental effects on the luminescence properties of a phosphor layer for high-power light emitting diodes, a high humidity and temperature test （85℃/85%RH） and a thermal aging test （85℃） were performed on silicone/YAG phosphor composites. The luminescence properties of silicone/phosphor composites are monitored by a fluorescence spectrometer. The results show that high temperature could result in an increase in conversion efficiency of composites during the early aging stage and red shift of YAG phosphor; and high humidity could result in a significant decrease in conversion efficiency of composites while having a small influence upon the optimal excitation wavelength of the YAG phosphor.
