Process for manufacturing a printed wiring board
    1.
    发明授权
    Process for manufacturing a printed wiring board 失效
    制造印刷电路板的工艺

    公开(公告)号:US06775907B1

    公开(公告)日:2004-08-17

    申请号:US09661738

    申请日:2000-09-14

    IPC分类号: H01K310

    摘要: The present invention teaches a simplified process for fabricating high density printed wiring boards using a semi-additive process. Steps required to achieve this objective include adhering an electroless plated copper commoning layer to a surface roughened dielectric substrate. Subsequently, the commoning layer is photolithographically personalized by covering the commoning layer with a resist and then uncovering predetermined areas of the aforementioned commoning layer. Consequently, the semi-additive method involves electroplating copper onto the uncovered areas of the commoning layer, thereby generating copper features and circuitry. Finally, the semi-additive process requires the stripping of the remaining photoresist, and the unplated electroless copper layer is etched in order to electronically isolate the copper features and circuitry lines.

    摘要翻译: 本发明教导了使用半添加法制造高密度印刷线路板的简化方法。 实现这一目标所需的步骤包括将化学镀铜共同层粘附到表面粗糙化的电介质基底上。 随后,通过用抗蚀剂覆盖共用层,然后露出上述公共层的预定区域,通过光刻来个性化普通层。 因此,半添加方法涉及将铜电镀到公共层的未覆盖区域上,由此产生铜特征和电路。 最后,半添加工艺需要剥离剩余的光致抗蚀剂,并且蚀刻未镀覆的无电镀铜层以便电绝缘铜特征和电路线。

    Process for manufacturing a printed wiring board
    2.
    发明授权
    Process for manufacturing a printed wiring board 失效
    制造印刷电路板的工艺

    公开(公告)号:US06212769B1

    公开(公告)日:2001-04-10

    申请号:US09343077

    申请日:1999-06-29

    IPC分类号: H05K330

    摘要: The present invention teaches a simplified process for fabricating high density printed wiring boards using a semi-additive process. A roughened copper foil is laminated to a dielectric substrate. The foil is subsequently removed from the dielectric to create a roughened, irregular surface on the dielectric substrate. Vertical angle through holes and blind holes are formed in the substrate. A uniform copper commoning layer is electrolessly plated to the roughened dielectric substrate and through holes. A photoresist is applied on the surface of the electroless plated layer and irradiated through a mask having printed circuit features. After developing the photoresist the uncovered electroless layer is electrolytically plated to create the final features and circuitry. After stripping the remaining photoresist the unplated electroless copper layer is etched to electronically isolate the copper features and circuitry lines.

    摘要翻译: 本发明教导了使用半添加法制造高密度印刷线路板的简化方法。 将粗糙化的铜箔层叠到电介质基板上。 随后从电介质中去除箔以在电介质基底上产生粗糙的不规则表面。 在基板上形成垂直角通孔和盲孔。 将均匀的铜共同层无电镀在粗糙化的电介质基片和通孔上。 将光致抗蚀剂施加在化学镀层的表面上并通过具有印刷电路特征的掩模照射。 在显影光致抗蚀剂之后,未覆盖的化学镀层被电解以产生最终特征和电路。 在剥离剩余的光致抗蚀剂之后,蚀刻未镀覆的无电解铜层以电绝缘铜特征和电路线。

    Method for forming electrical connection to the inner layers of a
multilayer circuit board
    6.
    发明授权
    Method for forming electrical connection to the inner layers of a multilayer circuit board 失效
    用于形成与多层电路板的内层的电连接的方法

    公开(公告)号:US5472735A

    公开(公告)日:1995-12-05

    申请号:US351819

    申请日:1994-12-08

    摘要: The present invention relates to a method for selectively electroetching a metal from an electrical device having the steps of: immersing the electrical device in an etching solution; immersing a cathode in the etching solution; applying an etching potential to a preselected area of the metal; and maintaining a passivation potential at the metal to remain unetched. The metal to remain unetched is not electrically connected to the preselected area and the passivation potential does not equal the etching potential.The present invention further relates to a method of forming an electrical connection to the inner layers of a multilayer circuit board having a copper foil surface layer and copper containing inner layers.

    摘要翻译: 本发明涉及一种从电气设备中选择性地电蚀金属的方法,其特征在于具有以下步骤:将电气设备浸入蚀刻液中; 将阴极浸入蚀刻溶液中; 将蚀刻电位施加到金属的预选区域; 并且保持在金属处的钝化电位以保持未蚀刻。 保持未蚀刻的金属不与预选区域电连接,并且钝化电势不等于蚀刻电位。 本发明还涉及一种形成与具有铜箔表面层和含铜内层的多层电路板的内层的电连接的方法。