公开(公告)号：US4639385A

公开(公告)日：1987-01-27

申请号：US781544

申请日：1985-09-30

申请人： William L. Jolitz ,  Richard A. Williams

发明人： William L. Jolitz ,  Richard A. Williams

IPC分类号： C08K3/02 ,  H01B3/40 ,  H05K9/00 ,  B05D3/02

CPC分类号： H01B3/40 ,  C08K3/02 ,  Y10T428/31511 ,  Y10T428/31529

摘要： A conformal coating protects electrical components used in a high voltage high vacuum evironment from flashovers caused by patch charging. The coating comprises a semiconductor powder, preferably elemental boron, having a low atomic number and uniformly dispersed throughout an organic binder such an an epoxy. The coating's surface resistivity is made to be high enough so that the coating acts as an electrical insulator. On the other hand, the coating's surface resistivity is sufficiently low that any patch charge is siphoned off to the nearest conductor. The surface resistivity is regulated by the proportion of semiconductor present. The coating's secondary electron emission coefficient is 1 or just under 1. The coating has the properties of adhesion, stability, elasticity, provision of mechanical support, and resistance to solvents and heat. An example is given in which the epoxy comprises resin, fine particles of elemental boron, and a polyamide hardener. The epoxy is mixed with solvents and sprayed or brushed onto the electrical components being protected, in this case a satellite TWTA EPC.

摘要翻译： 保形涂层保护高压高真空环境中使用的电气部件免受由贴片充电引起的闪络。 该涂层包含半导体粉末，优选元素硼，其原子序数低，并且均匀分散在整个有机粘合剂中，例如环氧树脂。 使涂层的表面电阻率足够高，使得涂层充当电绝缘体。 另一方面，涂层的表面电阻率足够低，使得任何贴片电荷被虹吸到最接近的导体。 表面电阻率由存在半导体的比例来调节。 涂层的二次电子发射系数为1或刚刚低于1.涂层具有粘合性，稳定性，弹性，提供机械支撑，耐溶剂和耐热性能。 给出其中环氧树脂包括树脂，元素硼的细颗粒和聚酰胺硬化剂的实例。 环氧树脂与溶剂混合并喷涂或刷涂到被保护的电气元件上，在这种情况下是卫星TWTA EPC。