Method for visual inspection of multilayer printed circuit boards
    1.
    发明公开
    Method for visual inspection of multilayer printed circuit boards 失效
    Verfahren zur visuellen Untersuchung von mehrschichtigen gedruckten Schaltungsplatten。

    公开(公告)号:EP0239017A2

    公开(公告)日:1987-09-30

    申请号:EP87104084.6

    申请日:1987-03-20

    IPC分类号: G01N21/88

    摘要: A method is disclosed for the visual inspection of electrical circuitry deposited in the layers of a multilayer printed circuit board wherein the dielectric layers of the multilayer board are prepared using a clear, light transparent thermosetting resin having incorporated therein a dye which is permeable to visible light but which absorbs ultraviolet light in the 320-440 nm region.
    The electrical circuitry in the board can be easily traced by an observer upon illumination of the board by visible light.

    摘要翻译: 公开了一种用于目视检查沉积在多层印刷电路板的层中的电路的方法,其中多层板的电介质层是使用透明的透光的热固性树脂来制备的,该热固性树脂中掺入了可渗透可见光的染料 但它吸收320-440 nm区域的紫外线。 当通过可见光照射电路板时,电路板中的电路可以很容易地被观察者跟踪。