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    • 3. 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。
    • 5. 发明授权
    • Methyl chloroform-free desmear process in additive circuitization
    • 甲基无氯化除垢工艺的加成电路
    • US5311660A
    • 1994-05-17
    • US15742
    • 1993-02-10
    • Warren A. AlpaughAnilkumar C. BhattMichael J. CanestaroRobert J. DayEdmond O. FeyJohn E. Larrabee
    • Warren A. AlpaughAnilkumar C. BhattMichael J. CanestaroRobert J. DayEdmond O. FeyJohn E. Larrabee
    • H05K3/26H05K3/00H05K3/42H01K3/10
    • H05K3/0055H05K2203/0783H05K2203/0789H05K2203/0796H05K2203/081H05K2203/088Y10T29/49165
    • Disclosed is a method of drilling, desmearing, and additively circuitizing a printed circuit board. The printed circuit board is drilled under conditions which produce glass and polymer smeared vias and through holes. The particulate debris is removed by vapor blasting the drilled printed circuit board. Next the printed circuit board is soaked in a solvent to swell the drill smear on the circuit interplanes of the printed circuit board. This solvent is then removed by entrainment in a gas, and a stream of an aqueous, acidic, oxidizing solution is passed through the printed circuit board holes to remove swollen smear in the thru holes and produce an etchback of conductors. After a water rinse an aqueous reducing solution is passed through the printed circuit board to reduce and remove aqueous acidic oxidizing solution, e.g., residual aqueous acid oxidizing solution. The printed circuit board is rinsed to remove the aqueous reducing solution. The surface of the printed circuit board is then seeded, the intended circuitization is photolithographically defined on the printed circuit board, and the circuitization, including the surface circuitization and the plated through hole circuitization, is additively plated.
    • 公开了一种对印刷电路板进行钻孔,去除和附加电路化的方法。 印刷电路板在产生玻璃和聚合物涂抹通孔和通孔的条件下钻孔。 通过对钻孔的印刷电路板进行蒸气喷射除去颗粒物。 接下来,将印刷电路板浸泡在溶剂中以使印刷电路板的电路插板上的钻头污迹膨胀。 然后通过夹带在气体中除去该溶剂,并且将水性,酸性氧化溶液流通过印刷电路板孔,以除去通孔中的溶胀污迹并产生导体回蚀。 在水冲洗之后,将水性还原溶液通过印刷电路板以减少并除去酸性氧化性水溶液,例如残留的酸性水溶液。 漂洗印刷电路板以除去还原水溶液。 然后将印刷电路板的表面接种,将预期的电路光刻地定义在印刷电路板上,并且包括表面电路化和电镀通孔电路的电路被附加电镀。