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    • 19. 发明申请
    • WATER SOLUBLE PROTECTIVE PASTE FOR MANUFACTURING PRINTED CIRCUIT BOARDS
    • 用于制造印刷电路板的水溶性保护胶
    • US20050001017A1
    • 2005-01-06
    • US10707724
    • 2004-01-07
    • Stefano Oggioni
    • Stefano Oggioni
    • H05K3/28B23K31/00
    • H05K3/282H01L2224/16225H01L2224/32225H01L2224/48227H01L2224/73265H01L2924/01019H01L2924/01079H05K3/1275H05K2203/049H05K2203/0534H05K2203/0786H01L2924/00
    • An improved water soluble protective paste and a method for protecting metal circuits and pads on the surface of an electronic board during the manufacturing steps. A densifier is added to the paste making it easier and more efficient the dispensing of the paste. After deposition the layer is dried until a solid protective film is obtained. An additional advantage obtained by the present invention is that the protective layer can be deposited also by means of an offset printing process, avoiding the use of the stencil and of the screening steps. Screening process is a labourious operation which requires very sophisticated equipment and a very high precision in the design of the stencil. Because of these requirements, screening is an expensive process. On the other hand offset printing is a very simple, cheap and reliable method. In addition, the film forming properties allow the material to create a protective film even with a thin deposited film.
    • 改进的水溶性保护膏和在制造步骤期间保护电子板表面上的金属电路和焊盘的方法。 将增稠剂添加到糊料中,使糊剂分配更容易和更有效。 沉积后,将层干燥直到得到固体保护膜。 通过本发明获得的另外的优点是保护层也可以通过胶版印刷工艺沉积,避免使用模版和筛选步骤。 筛选过程是一项精心的操作,需要非常精密的设备和极高的模具设计精度。 由于这些要求,筛选是一个昂贵的过程。 另一方面,胶印是一种非常简单,便宜可靠的方法。 此外,成膜性能即使用薄的沉积膜也能够使材料形成保护膜。