Method for making printed circuit boards
    162.
    发明授权
    Method for making printed circuit boards 失效
    制造印刷电路板的方法

    公开(公告)号:US5472546A

    公开(公告)日:1995-12-05

    申请号:US244641

    申请日:1994-05-27

    Abstract: To make a printed circuit board, bores bridge gaps between where conductor paths are to be located, and are then filled with an adhesive. The gaps between where the conductor paths are to be located then caustically removed so that a conductor path skeleton results which is held together by the adhesive bridges. Finally, the conductor path skeleton is affixed to an insulating layer.

    Abstract translation: PCT No.PCT / EP93 / 02167 Sec。 371日期:1994年5月27日 102(e)日期1994年5月27日PCT提交1993年8月14日PCT公布。 公开号WO94 / 08441 日期1994年04月14日。为了制造印刷电路板,在导体路径所在的位置之间插入桥接间隙,然后用粘合剂填充。 导体路径之间的位置之间的间隙将被苛刻地去除,从而导致通过粘合剂桥固定在一起的导体路径骨架。 最后,将导体路径骨架固定在绝缘层上。

    Method of manufacturing a printed wiring board
    163.
    发明授权
    Method of manufacturing a printed wiring board 失效
    制造印刷电路板的方法

    公开(公告)号:US5464725A

    公开(公告)日:1995-11-07

    申请号:US959752

    申请日:1992-10-13

    Abstract: After pads 2 for mounting parts are formed at desired positions on an insulating board 1 in a circuit forming process using etching resist 3, the etching resist 3 is left on the pads without peeling it off. A first photosolder resist 4 is then formed between the pads 2, exposed to light, and developing using a solvent able to separate the etching resist 3 as a developing liquid, following which the etching resist 3 is peeled off together with the not yet fully hardened first photosolder resist 4. After formation of the first photosolder resist 4, a second photosolder resist is formed on desired areas excluding the interspaces between the pads 2, exposed to light, and developed. Consequently, when a photosolder resist is formed between pads pitched at narrow intervals on a printed wiring board, attachment of the photosolder resist to the pads due to misalignment between the insulating board and a photo-mask can be avoided.

    Abstract translation: 在使用抗蚀剂3的电路形成工艺中,在绝缘板1上的期望位置处形成用于安装部件的焊盘2之后,将抗蚀剂3留在焊盘上而不剥离。 然后将第一光固化剂抗蚀剂4形成在暴露于光的焊盘2之间,并使用能够分离作为显影液的抗蚀剂3的溶剂显影,随后将抗蚀剂3与尚未完全硬化 第一光固化剂抗蚀剂4.在形成第一光致抗蚀剂4之后,在除了被曝光的衬垫2之间的间隙之外的所需区域上形成第二光固化抗蚀剂并显影。 因此,当在印刷电路板上以窄间隔形成在衬垫之间形成光阻抗剂时,可以避免由于绝缘板和光掩模之间的不对准而将光敏抗蚀剂附着到焊盘。

    Fabrication method of printed wiring board
    164.
    发明授权
    Fabrication method of printed wiring board 失效
    印刷电路板的制造方法

    公开(公告)号:US5464662A

    公开(公告)日:1995-11-07

    申请号:US300131

    申请日:1994-09-02

    Abstract: A fabrication method of a printed wiring board in which the halation effect of light irradiated to a solder resist film is utilized in a process of selectively removing the solder resist film. After a conductive layer is patterned to a given circuit pattern including soldering pads, the solder resist film is formed on the base material to cover the patterned conductive layer. The solder resist film is selectively exposed to light utilizing reflection of the irradiated light from the insulating base material and developed so that the solder resist film is selectively left in areas adjacent to the respective soldering pads. Then, an etching resist film is formed to cover the patterned conductive layer except for the soldering pads, and surface areas of the respective soldering pads are selectively etched using the etching resist film as a mask to produce solder resist dams made of the solder resist film left on the base material. Solder films are formed on the respective soldering pads thus selectively etched. Electronic components can be soldered on the soldering pads with satisfactory reliability even if the soldering pads have narrow pitches such as 500 .mu.m or less.

    Abstract translation: 在选择性去除阻焊膜的工序中,利用照射到阻焊膜的光的晕影效果的印刷电路板的制造方法。 在将导电层图案化为包括焊盘的给定电路图案之后,在基底材料上形成阻焊膜以覆盖图案化的导电层。 利用来自绝缘基材的照射光的反射来选择性地将阻焊膜暴露于光,并显影,使得阻焊膜选择性地留在与各个焊盘相邻的区域中。 然后,形成抗蚀剂膜以覆盖除了焊盘之外的图案化导电层,并且使用抗蚀剂膜作为掩模来选择性地蚀刻各个焊盘的表面积,以形成由阻焊膜制成的阻焊堤 留在基材上。 在相应的焊盘上形成焊接膜,从而选择性地蚀刻。 即使焊盘具有500μm以下的窄间距,也可以将电子部件焊接在焊盘上,其可靠性良好。

    Multilayer printed wiring boards
    168.
    发明授权
    Multilayer printed wiring boards 失效
    多层印刷线路板

    公开(公告)号:US4927742A

    公开(公告)日:1990-05-22

    申请号:US275358

    申请日:1988-11-23

    Applicant: Thomas S. Kohm

    Inventor: Thomas S. Kohm

    Abstract: A multilayer printed wiring board is described having (1) an inner layer conductive pattern on an organic insulating base material, (2) a poly(vinyl acetal)-phenolic resin coating containing an amine substituted organic zirconate or titanate coupling agent, (3) a dielectric insulating layer, (4) a bonding composition capable of being adhesion promoted for electroless metal deposition comprising a phenolic resin having at least two methylol groups and substantially free of methyl ether groups, a heat resistant aromatic or cyclic resin having functional groups capable of reacting with the methylol groups without the evolution of water, and (5) an outer conductive pattern, the multilayer board being capable of withstanding at least five soldering cycles of at least 255.degree. C. for 2 seconds without blistering or delamination. Processes for manufacturing the multilayer board are also described.

    Abstract translation: 描述了一种多层印刷线路板,其具有(1)有机绝缘基材上的内层导电图案,(2)含有胺取代的有机锆酸酯或钛酸酯偶联剂的聚(乙烯醇缩醛) - 酚醛树脂涂料,(3) 电介质绝缘层,(4)能够进行无电金属沉积的粘合促进的粘合组合物,其包含具有至少两个羟甲基并且基本上不含甲基醚基团的酚醛树脂,具有能够 与羟甲基进行反应而不发生水分,和(5)外部导电图案,该多层板能够承受至少255℃的至少五个焊接周期,持续2秒而没有起泡或分层。 还描述了用于制造多层板的工艺。

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