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    • 3. 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。
    • 10. 发明授权
    • Process for recovering high boiling solvents from a photolithographic waste stream comprising at least 10 percent by weight of monomeric units
    • 从包含至少10重量%单体单元的光刻废料流中回收高沸点溶剂的方法
    • US06187965B1
    • 2001-02-13
    • US09188007
    • 1998-11-06
    • Anilkumar C. BhattJerome J. Wagner
    • Anilkumar C. BhattJerome J. Wagner
    • C07C2980
    • C07D307/33C07C29/80C07C33/20C07C33/22C07C33/24
    • A method of recovering benzyl alcohol, gamma butyrolactone, or propylene carbonate from an impure effluent stream of an industrial process is provided. The effluent waste stream contains greater than about 10 percent by weight of monomeric units that are reacted to form larger oligomers and polymers. The first step in the recovery process involves polymerizing the monomeric units present in the effluent waste stream under conditions effective to reduce the concentration of monomeric units in the waste stream to less than about 10 weight percent. The waste stream then is fed to a first separation stage where it is separated into (i) a gaseous stream of water, soluble gases, and volatile contaminants and (ii) a suspension comprising the high boiling solvent, semi-volatile materials, and non-volatile contaminants and materials. Then the dewatered, low vapor pressure, high boiling solvent-containing suspension is either distilled or evaporated to separate the high boiling solvent from non-volatile materials. In this second separation stage, the solvent-containing suspension is separated into (i) a solvent-containing fraction, and (ii) a sludge fraction. The sludge fraction contains non-volatile materials in the high boiling solvent.
    • 提供了从工业过程不纯的流出物流中回收苄醇,γ-丁内酯或碳酸亚丙酯的方法。 流出物废物流含有大于约10重量%的单体单元,其被反应以形成较大的低聚物和聚合物。 回收过程中的第一步包括在有效降低废物流中的单体单元浓度至小于约10重量%的条件下聚合存在于流出物废物流中的单体单元。 然后将废物流送入第一分离阶段,在该分离阶段将其分离为(i)气态的水流,可溶性气体和挥发性污染物,和(ii)包含高沸点溶剂,半挥发性物质和非挥发性物质的悬浮液 挥发性污染物和材料。 然后将脱水,低蒸气压,高沸点溶剂的悬浮液蒸馏或蒸发,以将高沸点溶剂与非挥发性物质分离。 在该第二分离阶段,将含溶剂的悬浮液分离成(i)含溶剂的级分,和(ii)污泥馏分。 污泥级分在高沸点溶剂中含有非挥发性物质。