CN100573864C - 铁合金引线整流用电子二极管及其制备方法 - Google Patents

铁合金引线整流用电子二极管及其制备方法 Download PDF

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CN100573864C
CN100573864C CNB2007101147380A CN200710114738A CN100573864C CN 100573864 C CN100573864 C CN 100573864C CN B2007101147380 A CNB2007101147380 A CN B2007101147380A CN 200710114738 A CN200710114738 A CN 200710114738A CN 100573864 C CN100573864 C CN 100573864C
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周少平
昃强
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ZHOU SHAOPING ZE QIANG
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Abstract

本发明涉及一种铁合金引线整流用电子二极管及其制备方法，电子二极管包括外壳、内部元器件和引线，其特征在于引线为铁合金引线，适宜的铁合金重量组成为碳＜0.05%、锰＜0.20%、硅＜0.01%、硫＜0.01%、磷＜0.013%和余量的铁，用铁合金引线代替纯铜引线，显著降低生产成本；简便易行的制备方法依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用专用焊接剂，并且在铁合金引线顶部全部涂敷。

Description

铁合金引线整流用电子二极管及其制备方法
技术领域
本发明涉及一种铁合金引线整流用电子二极管及其制备方法，用于降低电子二极管的生产成本。
背景技术
整流用二极管应用之广，随处可见，其生产工艺也成熟规模自动化，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其中，电镀主要是指锡电镀，酸洗中包括混酸洗、磷酸-双氧水洗和氨水洗，一般还有最后的纯水振荡处理。在现有的整流二极管中，由于各方面的因素，其引线全部为纯铜引线，价格很高，导致生产成本高，但是因为没有可用的其它金属引线，导致无法选择。对应的酸洗中，满足酸洗要求的控制条件是，混酸洗的酸洗液体积组成一般为硝酸∶氢氟酸∶乙酸∶硫酸＝(7～11)∶(7～11)∶(10～15)∶(3～5)；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为(0.3～2.0)∶(0.3～2.0)∶(1～5)。
发明内容
本发明的目的在于提供一种铁合金引线整流用电子二极管，用铁合金引线代替纯铜引线，显著降低生产成本；本发明同时提供了简便易行的制备方法。
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线。
成功地探索了适宜的铁合金的重量组成为：碳＜0.05％、锰＜0.20％、硅＜0.01％、硫＜0.01％、磷＜0.013％和余量的铁。
制备方法仍然依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，在此基础上，作一些适应性的调整，焊接使用专用焊接剂，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝(7～11)∶(7～11)∶(10～15)∶(6～10)，硫酸的加入量增大后，主要对铁起钝化作用。
酸洗中，磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为(0.3～2.0)∶(0.3～2.0)∶(1～5)，外加(0.3～2.0)克的焦磷酸钠/100ml，焦磷酸钠对双氧水起稳定作用。
酸洗中，氨水洗的氨水洗液体积组成为：氨水∶水＝1∶(1～5)。
酸洗时间分别控制为：混酸洗150～200秒，磷酸-双氧水洗60～90秒，氨水洗60～90秒。
其它按照常规工艺进行。
经过对铁合金引线整流二极管(IN4007)进行试制对比，在1300V以上的SHARP率测试中，抽测1200支的三次结果分别为86％、98％和92％，均满足了合格要求。试验工厂纯铜引线的同型整流二极管的平均SHARP率在95％。
本发明成功地研制了能够代替纯铜引线的铁合金引线，使整流电子二极管的生产成本显著降低，提高企业的市场竞争力，也节约了纯铜物质资源。制备方法科学合理、简单易行，便于实施。
具体实施方式
下面结合实施例对本发明作进一步说明。
实施例1
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.04％、锰0.01％、硅0.006％、硫0.005％、磷0.010％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用专用焊接剂——广东惠州市翔辉化工公司生产的翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝9∶9∶12∶8；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为1∶1∶3，外加1克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶3。
酸洗时间分别为：混酸洗180秒，磷酸-双氧水洗72秒，氨水洗72秒。
实施例2
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.03％、锰0.16％、硅0.008％、硫0.005％、磷0.01％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上自胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝10∶9∶12∶9；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为1.2∶1.3∶4，外加1.2克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶4。
酸洗时间分别为：混酸洗180秒，磷酸-双氧水洗70秒，氨水洗72秒。
实施例3
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.04％、锰0.15％、硅0.007％、硫0.05％、磷0.011％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝8∶9∶11∶7；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为0.8∶1∶2.5，外加0.8克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶2.5。
酸洗时间分别为：混酸洗170秒，磷酸-双氧水洗80秒，氨水洗70秒。
实施例4
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.02％、锰0.17％、硅0.006％、硫0.008％、磷0.01％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝10∶10∶12∶7；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为1∶1.2∶3，外加0.9克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶3。
酸洗时间分别为：混酸洗200秒，磷酸-双氧水洗72秒，氨水洗75秒。
实施例5
本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.04％、锰0.13％、硅0.009％、硫0.006％、磷0.011％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝7∶10∶10∶6；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为0.4∶1.6∶5，外加0.4克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶(2～4)。
酸洗时间分别为：混酸洗150秒，磷酸-双氧水洗60秒，氨水洗70秒。
实施例6、本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.04％、锰0.15％、硅0.007％、硫0.05％、磷0.011％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝11∶8∶14∶9；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为1.6∶0.8∶3，外加1.6克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶(2～4)。
酸洗时间分别为：混酸洗160秒，磷酸-双氧水洗65秒，氨水洗75秒。
实施例7、本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.03％、锰0.16％、硅0.008％、硫0.005％、磷0.01％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸：硫酸＝10∶11∶15∶7；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为1.7∶1.5∶4，外加1.5克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶5。
酸洗时间分别为：混酸洗200秒，磷酸-双氧水洗90秒，氨水洗80秒。
实施例8、本发明所述的铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其引线为铁合金引线，铁合金的重量组成为碳0.02％、锰0.17％、硅0.006％、硫0.008％、磷0.01％和余量的铁。
制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其焊接使用翔辉XH02H-011焊之宝，并且在铁合金引线顶部全部涂敷。
酸洗中，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝8∶10∶12∶8；磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为0.9∶1.0∶2，外加0.8克的焦磷酸钠/100ml；氨水洗的氨水洗液体积组成为：氨水∶水＝1∶2.5。
酸洗时间分别为：混酸洗190秒，磷酸-双氧水洗75秒，氨水洗80秒。

Claims (4)

1、一种铁合金引线整流用电子二极管，包括外壳、内部元器件和引线，其特征在于引线为铁合金引线，铁合金的重量组成为碳＜0.05％、锰＜0.20％、硅＜0.01％、硫＜0.01％、磷＜0.013％和余量的铁。
2、一种根据权利要求1所述的铁合金引线整流用电子二极管的制备方法，依次进行引线、装填、焊接、酸洗、上白胶、成型和电镀，其特征在于焊接使用焊接剂，并且在铁合金引线顶部全部涂敷，酸洗中包括混酸洗、磷酸-双氧水洗和氨水洗，混酸洗的酸洗液体积组成为硝酸∶氢氟酸∶乙酸∶硫酸＝(7～11)∶(7～11)∶(10～15)∶(6～10)。
3、根据权利要求2所述的制备方法，其特征在于磷酸-双氧水洗的复合洗液组成为：磷酸、双氧水和水的体积比为(0.3～2.0)∶(0.3～2.0)∶(1～5)，外加(0.3～2.0)克的焦磷酸钠/100ml。
4、根据权利要求3所述的制备方法，其特征在于酸洗时间分别为：混酸洗150～200秒，磷酸-双氧水洗60～90秒，氨水洗60～90秒。
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