考虑底充胶固化过程的InSb面阵探测器结构分析模型

发布时间：2018-03-21 00:25

本文选题：焦平面　切入点：锑化铟　出处：《物理学报》2017年01期 　论文类型：期刊论文

【摘要】：液氮冲击中In Sb面阵探测器的易碎裂特性制约着探测器的成品率,建立适用于面阵探测器全工艺流程的结构模型是分析、优化探测器结构的有效手段.本文提出了用底充胶体积收缩率来描述底充胶在恒温固化中的体积收缩现象,同时忽略固化中底充胶弹性模量的变化来建立底充胶固化模型,给出了底充胶在恒温固化中生成的热应力/应变上限值.借鉴前期提出的等效建模思路,结合底充胶固化后的自然冷却过程和随后的液氮冲击实验,建立了适用于In Sb面阵探测器全工艺流程的结构分析模型.探测器历经底充胶固化、自然冷却至室温后的模拟结果与室温下拍摄的探测器形变分布照片高度符合.随后模拟液氮冲击实验,得到面阵探测器中累积的热应力/应变随温度的演变规律,热应力/应变值极值出现的温度区间与液氮冲击实验结果相符合.这表明所建模型适用于预测不同工艺阶段中面阵探测器的形变分布及演变规律.
[Abstract]:The breakage property of in SB array detector in liquid nitrogen impact restricts the yield of the detector. The structural model suitable for the whole process flow of plane array detector is analyzed. In this paper, the volume shrinkage rate of the bottom filled adhesive is proposed to describe the volume shrinkage phenomenon of the underfilled adhesive during the constant temperature curing, and the model of the underfilled adhesive curing is established by ignoring the change of the elastic modulus of the underfilled adhesive during the curing. The upper limit value of thermal stress / strain produced by the underfilled adhesive during the isothermal curing was given. The equivalent modeling idea was used for reference, combined with the natural cooling process after the solidification and the subsequent liquid nitrogen impact test. A structural analysis model suitable for the whole process of in SB array detector is established. The simulation results after natural cooling to room temperature are in good agreement with the photos of the deformation distribution of the detectors taken at room temperature. The evolution of thermal stress / strain accumulated in the array detector with temperature is obtained by simulating the liquid nitrogen shock test. The temperature range of the extreme value of thermal stress / strain value is in agreement with the results of liquid nitrogen shock test, which indicates that the model is suitable for predicting the deformation distribution and evolution law of the array detector in different process stages.
【作者单位】：河南科技大学信息工程学院;河南质量工程职业学院;中国空空导弹研究院红外探测器技术航空科技重点实验室;
【基金】：国家自然科学基金青年科学基金(批准号:61505048) 航空科学基金(批准号:20152442001)资助的课题~~
【分类号】：TN215

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