| 红外探测器杜瓦窗口钎焊工艺优化 |
| 投稿时间：2024-11-12 修订日期：2024-11-28 点此下载全文 |
| 引用本文：李云龙,沈星,吴丰顺,周龙早,宋立志,洪晓麦.红外探测器杜瓦窗口钎焊工艺优化[J].红外,2025,46(3):8~15 |
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| 中文摘要:杜瓦窗口是红外探测器的核心部件之一，其焊接质量对探测器的真空维持时长以及长期运行的稳定性具有决定性影响。本试验通过引入两种预成型焊料环进行真空钎焊，替代传统的手工SAC305焊膏软钎焊工艺，并对杜瓦窗口的外观质量、气密性能、空洞率以及焊接强度进行了研究。试验结果表明，当使用具有中间层Ni骨架结构的SnAgCu复合焊料环进行真空钎焊时，杜瓦窗口漏率可以达到小于1×10-12 Pa·m3/s的高气密性要求，空洞率可降低至1%。对杜瓦窗口进行了抗拉强度测试。结果表明，当工艺参数为250 ℃、5 min、0.32 MPa时，抗拉强度达到最大值66.73 Mpa；与传统手工SAC305焊膏软钎焊接头相比，增加了10.19%。同时，该方法可以改善工艺的一致性，大幅提升生产效率，对杜瓦窗口量产工艺具有一定的指导意义。 |
| 中文关键词:杜瓦窗口 焊接空洞 工艺优化 |
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| Optimization of Brazing Process for Dewar Windows in Infrared Detectors |
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| Abstract:Dewar window is one of the core components of infrared detectors. Its welding quality has a decisive influence on the vacuum maintenance time and long-term operation stability of the detector. In this experiment, two preformed solder rings are introduced for vacuum brazing to replace the traditional manual SAC305 solder paste soft soldering process, and the appearance quality, airtightness, void rate and welding strength of the dewar window are studied. The experimental results show that when the SnAgCu composite solder ring with an intermediate layer of Ni skeleton structure is used for vacuum brazing, the leakage rate of the dewar window can reach a high airtightness requirement of less than 1×10-12 Pa·m3/s, and the void rate can be reduced to 1%. The tensile strength of the dewar window is tested. The results show that when the process parameters are 250 ℃, 5 min, and 0.32 MPa, the tensile strength reaches a maximum value of 66.73 MPa; compared with the traditional manual SAC305 solder paste soft soldering joint, it increases by 10.19%. At the same time, this method can improve the consistency of the process and greatly improve the production efficiency, which has a certain guiding significance for the mass production process of the dewar windows. |
| keywords:dewar window solder void process optimization |
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