排序方式: 共有18条查询结果,搜索用时 15 毫秒
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介绍了高可靠电镀Ni/Au工艺在PTFE微波印制电路上的应用,并分析了氨基磺酸盐镀软镍和亚硫酸盐镀软金工艺的影响因素及提高Ni/Au镀层之间附着力的措施。通过实验及应用证明了与直接镀金工艺相比,在软基材PTFE敷铜箔板上镀Ni/Au工艺能大大提高微波电路的可焊性,高温稳定性和长期可靠性,并且用其所制作的微波器件的高频性能也优于直接镀金工业。 相似文献
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Proton radiography experiment with a Zumbro lens system was carried out on an 11 MeV proton cyclotron.The experimental results show that the image blurring is improved markedly. Clear images and good spatial resolution of the density step edges are obtained, which is important for hydrotest experiments, and the spatial resolution can achieve ~100 μm. 相似文献
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用于制作微波器件的脉冲图形镀金工艺研究 总被引:1,自引:0,他引:1
介绍了微波成电路中一种新的制作技术-脉冲图形电镀技术,并对影响脉冲电镀技术的关键因素-亚硫酸盐镀 组成及稳定性,添加剂TT-1和PP-1的作用脉冲波形的影响,产生镀层结瘤和微坑,夹杂的原因等作了详细的分析和探讨。 相似文献
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多层介质阻挡放电可在纵向空间增大放电等离子体的体积及其与材料相互作用的表面积,在实际工业生产中将有广泛的应用前景。为此采用单极性重复频率高压亚微秒脉冲功率源,激励多层介质阻挡放电,在大气压空气中直径130 mm区域,获得3层介质2层间隙分别为2 mm、2 mm以及5层介质4层间隙分别为1 mm、1 mm、1 mm、2 mm的均匀放电等离子体,采用普通相机(曝光时间1/17 s)对放电图像进行拍摄,不能分辨放电细丝的存在。采用ICCD对三层介质挡板两层2 mm间隙放电过程进行高速摄影实验,在曝光时间5 ns情况下对放电等离子体进行拍摄,发现上下两层间隙放电发光均匀分布在整个放电间隙,并且两层发光强弱保持良好的一致性,表明多层介质阻挡放电击穿具有同时性。 相似文献
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Dielectric barrier discharge(DBD) attracts lots of attentions for its great application promises,and the rotational temperature is one of its mostly important parameters.In order to measure the rotational temperature of a pulsed DBD in atmospheric air,the temperature is studied by using optical emission spectroscopy(OES).The discharge is excited by a high voltage pulse with 124 ns rise time and 230 ns full width at half maximum(FWHM) at a repetition rate of a few hundred hertz.The rotational temperatures are studied using different voltages,different repetition rates of the pulse power supply,and different gaps between dielectrics: They are in the range from 390 K to 500 K during the whole discharge.When the gap between dielectrics increases,the rotational temperature initially decreases and then increases.The rotational temperature changes complexly when the pulse repetition rate changes.When the voltage increases,the rotational temperature always decreases,which is not expected.These results allow one to predict the rotational temperature at different supply power parameters and electrode configurations,which is useful for the DBD’s industrial application. 相似文献
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介绍超宽带微波器件精细图形的制作技术和即图形电镀技术。通过对影响微波集成电路图形电镀技术的关键因素的讲话和优化,得到了图形电镀技术的最佳工作条件,解决了薄膜工艺中难以制作精细图形的难题。运用这种技术,已经制作出了2-18GHz放大器,相关器,均衡器等许多超宽带微波器件,并取得了满意的效果。 相似文献