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    • 5. 发明授权
    • Process for manufacturing a printed wiring board
    • 制造印刷电路板的工艺
    • US06212769B1
    • 2001-04-10
    • US09343077
    • 1999-06-29
    • Christina M. BoykoRobert J. DayKristen A. Stauffer
    • Christina M. BoykoRobert J. DayKristen A. Stauffer
    • H05K330
    • H05K3/426H05K3/108H05K3/181H05K3/381H05K2203/1152H05K2203/122Y10T29/49155Y10T29/49165Y10T29/49167
    • 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.
    • 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。