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2. 发明授权

US5685961A Method for fabrication of metallized medical devices 失效
标题翻译：金属化医疗器械的制造方法
公开(公告)号：US5685961A
公开(公告)日：1997-11-11
申请号：US859063
申请日：1992-03-27
申请人： Kambiz Pourrezaei , Richard Burnham Beard , Raymond Leon Boxman , Irina Shvets , Mark DeLaurentis
发明人： Kambiz Pourrezaei , Richard Burnham Beard , Raymond Leon Boxman , Irina Shvets , Mark DeLaurentis
IPC分类号： C23C14/04 , C23C14/20 , C23C14/56 , C23C18/20 , C23C18/44 , C23C14/34 , A01N1/02
CPC分类号： C23C14/205 , C23C14/046 , C23C14/568 , C23C18/2086 , C23C18/285 , C23C18/30 , C23C18/44
摘要： Catheters and other medical devices include plural layers of metals applied to the outer surfaces, which tend to close minuscule cracks through which corrosion may attack the underlying support. In some avatars, the initial layer of material is preferably silver, applied following specific preparation steps. In other embodiments, succeeding layers of metal completely cover the initial layer, and are also of silver. The succeeding layers are deposited after deposition of the prior layer, and tend to reduce the incidence of microscopic pores or cracks and are less prone to delamination. The succeeding layers are preferably of mutually different metals between layers. In a particular avatar, in which the exposed metals are oligodynamic silver and more noble platinum, the exposed silver layer lies over a portion of the platinum layer, to thereby prevent corrosion of the silver layer from disconnecting portions of the silver layer. Fabrication methods include deposition of successive layers by means of sputtering in a longitudinal array of cylindrical magnetron sections, in which each section applies one layer of the coating over the coating applied by the preceding section. The magnetron sections may be energized and deenergized in a temporal pattern associated with the progress of the workpiece material through the array, to thereby cover or expose particular longitudinal layers. In some embodiments, a first layer of electrically conductive material is deposited by electroless methods particularly in the lumen, following which additional layers may be applied by conventional electrolytic deposition. An electroless method according to the invention includes preparation steps which may include ultrasonically cleaning the surface with a solution of isopropyl alcohol, then drying the surface with a stream of dry gas, and etching the surface with a solution of sodium naphthalene in diethylene glycol dimethyl ether.
摘要翻译：导管器和其他医疗装置包括施加到外表面的多层金属，其倾向于封闭微小的裂纹，腐蚀可能通过该裂纹攻击下面的支撑件。在一些化身中，材料的初始层优选为银，其具体制备步骤应用。在其它实施方案中，后续的金属层完全覆盖初始层，并且也是银。随后的层在沉积先前的层之后沉积，并且倾向于减少微观孔或裂缝的发生，并且不易分层。后续层优选在层之间彼此不同的金属。在其中露出的金属是低能动力银和更贵贵的铂的特定化身中，暴露的银层位于铂层的一部分上，从而防止银层的腐蚀从银层的部分断开。制造方法包括在圆柱形磁控管部分的纵向阵列中通过溅射沉积连续的层，其中每个部分在由前面部分施加的涂层上施加一层涂层。磁控管部分可以被激励并以与工件材料通过阵列的进展相关联的时间模式被断电，从而覆盖或暴露特定的纵向层。在一些实施例中，第一层导电材料通过无电解方法特别是在内腔中沉积，随后可以通过常规电解沉积来施加另外的层。根据本发明的无电解方法包括制备步骤，其可以包括用异丙醇溶液超声清洗表面，然后用干燥气流干燥表面，并用萘二甲酸二甲酯中的萘溶液蚀刻表面。

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