Printed wiring board
    93.
    发明公开
    Printed wiring board 失效
    印刷线路板

    公开(公告)号:EP0346522A3

    公开(公告)日:1991-04-03

    申请号:EP88113478.7

    申请日:1988-08-19

    Abstract: The invention relates to a printed wiring board which forms printed circuit conductors (2) on at least one surface of a base plate (1) and having a solder resist layer (3) on at least a portion of the base plate (1) having the conductors (2). The solder resist film (3) is a foamed material which contains a foamable agent mixed with a main composition of the solder resist film forming ink.

    Abstract translation: 本发明涉及一种印刷电路板,其在基板(1)的至少一个表面上形成印刷电路导体(2),并且在基板(1)的至少一部分上具有阻焊层(3) 导体(2)。 阻焊膜(3)是含有与阻焊膜形成油墨的主要成分混合的发泡剂的发泡材料。

    Chemical etching method
    99.
    发明公开
    Chemical etching method 失效
    ChemischesÄtzverfahren。

    公开(公告)号:EP0095172A2

    公开(公告)日:1983-11-30

    申请号:EP83105052.1

    申请日:1983-05-21

    Abstract: A member (12) to be etched is subjected to etching through a mask layer (13) of a predetermined pattern and that portion of the mask layer (13) overhanging a side-etched portion resulting from the etching is bent down to be jointed by an adhesive binder (33) to the side wall of the side-etched portion to form a first etching-resistant layer (18). Then the member (12) to be etched is subjected again to etching using the first etching-resistant layer (18) and the mask layer (13) as an etching mask.

    Abstract translation: 要蚀刻的构件(12)通过预定图案的掩模层(13)进行蚀刻,并且将由蚀刻产生的侧蚀刻部分悬垂的掩模层(13)的那部分向下弯曲以被接合 粘合剂粘合剂(33)到侧蚀刻部分的侧壁以形成第一耐蚀刻层(18)。 然后,使用第一耐蚀刻层(18)和掩模层(13)作为蚀刻掩模再次对待蚀刻的构件(12)进行蚀刻。

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