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    • 2. 发明申请
    • LEAD-FREE SOLDER REWORKING SYSTEM AND METHOD THEREOF
    • 无铅焊枪制作系统及其方法
    • US20070181640A1
    • 2007-08-09
    • US11380224
    • 2006-04-26
    • Wen-Chi ChenJauwhei Hong
    • Wen-Chi ChenJauwhei Hong
    • A47J36/02
    • B23K3/0653B23K2101/42H05K3/3447H05K3/3463H05K3/3468H05K2203/111H05K2203/176
    • A lead-free solder reworking method. A solder tank including a nozzle and containing molten lead-free solder is provided. A printed circuit board assembly is placed on the solder tank. The printed circuit board assembly has a printed circuit board and a first electronic member. The printed circuit board has at least one through hole. The first electronic member has at least one first pin soldered in the through hole by lead-free solder. The through hole and first pin are located above the nozzle. A reworking temperature and a reworking time are established. The printed circuit board is heated until the temperature thereof reaches the reworking temperature. The nozzle outputs the molten lead-free solder from the solder tank to the through hole of the printed circuit board until the nozzle operates for the reworking time.
    • 无铅焊锡返修方法。 提供了包括喷嘴并且包含熔融无铅焊料的焊料槽。 印刷电路板组件放置在焊料槽上。 印刷电路板组件具有印刷电路板和第一电子部件。 印刷电路板至少有一个通孔。 第一电子部件具有通过无铅焊料在通孔中焊接的至少一个第一引脚。 通孔和第一销位于喷嘴上方。 建立了返工温度和返工时间。 印刷电路板被加热直到其温度达到返工温度。 喷嘴将熔融无铅焊料从焊料槽输出到印刷电路板的通孔,直到喷嘴工作为返工时间。
    • 4. 发明授权
    • Emissive coating for X-ray target
    • 用于X射线靶的发射涂层
    • US4840850A
    • 1989-06-20
    • US861523
    • 1986-05-09
    • Clarence O. ClarkJauwhei Hong
    • Clarence O. ClarkJauwhei Hong
    • H01J35/10C23C4/10C23C4/18C23C24/10H01J35/08
    • C23C24/10C23C4/10C23C4/11C23C4/18H01J35/08
    • The present invention employs a mechanical mixture of titanium dioxide and calcium oxide which is sintered and ground to produce a ceramic powder for application to a target of an X-ray tube. The powder is fused by baking the target at a predetermined baking temperature to produce a coating having an enhanced coefficient of emissivity. The required baking temperature is controllable by varying the proportion of titanium dioxide to calcium oxide. Baking time may be extended without degrading the coating by mechanically mixing zirconium dioxide to the sintered and ground ceramic powder prior to application to the X-ray target in order to enhance outgassing from the target substrate. The resulting coating on the target improves the emissivity thereof and exhibits and improved bond strength over coatings of the prior art.
    • 本发明使用二氧化钛和氧化钙的机械混合物,其被烧结并研磨以产生用于X射线管的靶的陶瓷粉末。 通过在预定的烘烤温度下烘烤目标物来熔化粉末,以产生具有增强的发射率系数的涂层。 通过改变二氧化钛与氧化钙的比例来控制所需的烘烤温度。 烘烤时间可以延长,而不会降低涂层,在施加到X射线靶之前将二氧化锆机械地混合到烧结和磨碎的陶瓷粉末中,以便增强从靶基底的脱气。 目标上得到的涂层改善了其现有技术的辐射率,并显示和改善了粘合强度。