Application of industrial CT technology in Hall current sensor quality inspection
-
摘要: 使用工业CT技术监测了霍尔电流传感器排针注塑体间的异物形态，并检测了二次注塑芯片中的引线弯曲、拉弧、球键合情况。通过CT图像分析，计算了针间异物的长宽尺寸，分析了形成机理，在此基础上，对排针注塑工艺进行制程改进。对分析难度大、体型微小的霍尔芯片，计算得到其注塑体内引线的弧长、弧高、弯曲角度、焊球直径等参数，进而对键合压力、烧球参数和工具做出调整，增加连接引线工艺的稳定性。使用工业CT技术提供的检测信息改善了霍尔电流传感器的制造工艺和环境，提高了器件的可靠性，提升了产品质量。Abstract: Industrial CT technology was used to monitor the shape of heteromorphic matters between injection molding pins of Hall current sensor and the bending, arcing and bonding of wires in the Hall chip. Through CT image analysis, the length and width of the heteromorphic matters were calculated quantitatively. Further, the molding process was improved. For the internal Hall chip, which is difficult to analyze and small in size, this research calculated the arc length, arc height, bending angle, solder ball diameter and other parameters of the wires in situ by analyzing industrial CT images. In this study, the information provided by industrial CT technology was used to optimize the process flow and manufacturing environment of Hall current sensor, so as to improve the device reliability and product quality.
-
Keywords:
- industrial CT /
- Hall current sensor /
- nondestructive testing /
- Hall chip
-
-
[1] 和劭延, 吴春会, 田建君.电流传感器技术综述[J].电气传动, 2018, 48(1):65-75. [2] 朱永康, 柏劲松.电动汽车电池管理系统中传感器技术应用研究[J].汽车电器, 2021(8):17-20. [3] JUD S, HEHN G.Key role of current sensor in battery management system of PEV[J].Sensor World, 2015, 21(6):38-40.
[4] 董耀文.电动汽车用霍尔电流传感器的设计[D].南京:南京航空航天大学. [5] 施玉书, 高思田, 宋旭, 等.工业CT在喷油器故障检测中的应用[J].计量技术, 2015(5):22-24. [6] 齐子诚, 倪培君, 张维国, 等.工业CT检测中小缺陷定量方法[J].科学技术与工程, 2021, 21(3):958-964. [7] 徐留根, 彭春增, 全建龙, 等.工业CT在航空机载传感器可靠性提升中的应用[J].传感器与微系统, 2016, 35(10):158-160 [8] 张叶娟, 时龙兴, 景卫平.多芯片封装键合失效分析与键合参数优化[D].南京:东南大学. [9] 贺玲, 刘洪涛.引线键合的失效机理及分析[J].微处理机, 2017, 38(6):17-20. [10] 张维国, 倪培君, 王晓艳.工业CT检测中主要工艺参数定量取值方法[J].2017, 39(12):7-14。 [11] 丁荣峥, 杨兵, 任春岭, 等.第一顺序键合引脚失效分析及键合可靠性提高[J].电子与封装, 2008, 8(5):1-4, 25. [12] 常亮, 孙彬, 徐品烈.金线引线键合失效的主要因素分析[J].先进封装技术与装备, 2021, 287(4):23-28.
计量
- 文章访问数: 6
- HTML全文浏览量: 0
- PDF下载量: 6
下载:
