Method of consistently producing a copper deposit on a substrate by
electroless deposition which deposit is essentially free of fissures
    3.
    发明授权
    Method of consistently producing a copper deposit on a substrate by electroless deposition which deposit is essentially free of fissures 失效
    通过无电沉积在衬底上一贯生产铜沉积物的方法,其沉积物基本上不含裂缝

    公开(公告)号:US4908242A

    公开(公告)日:1990-03-13

    申请号:US187821

    申请日:1988-04-29

    Abstract: Electroless metal plating solutions are formulated and controlled to provide high quality metal deposits by establishing the intrinsic cathodic reaction rate of the solution less than 110% of the intrinsic anodic reaction rate. Methods are provided to formulate electroless copper plating solutions which can deposit copper on printed wiring boards of quality sufficient to pass a thermal stress of 10 seconds contact with molten solder at 288.degree. C. without cracking the copper deposits on the surface of the printed wiring boards or in the holes. The ratio of the anodic reaction rate to the cathodic reaction rate can be determined by electrochemical measurements, or it can be estimated by varying the concentration of the reactants and measuring the plating rates.

    Abstract translation: 配制和控制化学镀金属溶液以通过确定溶液的本征阴极反应速率小于内在阳极反应速率的110%来提供高质量的金属沉积物。 提供了方法来制备化学镀铜溶液,其可以将印刷电路板上的铜沉积到质量足以使与熔融焊料在288℃下接触10秒的热应力,而不会破坏印刷线路板表面上的铜沉积物 或在洞里。 阳极反应速率与阴极反应速率的比例可以通过电化学测量来确定,或者可以通过改变反应物的浓度和测量电镀速率来估算。

    Electroless deposition for IC fabrication
    5.
    发明授权
    Electroless deposition for IC fabrication 失效
    化学沉积用于IC制造

    公开(公告)号:US5169680A

    公开(公告)日:1992-12-08

    申请号:US850251

    申请日:1992-03-11

    CPC classification number: H01L21/76877 H01L21/288 H01L21/76879

    Abstract: Electroless deposition of a conducting material on an underlying conductive region is used in a fabrication of a semiconductor device. Electroless deposition provides a selective and an additive process for forming conductive layers, filling window and providing interconnections and terminals. The conducting material is selectively deposited on a catalytic underlying surface. When the underlying surface is not catalytic, an activation step is used to cause the surface to be catalytic. Where the base underlying surface is a substrate, a contact region is formed on the substrate for electroless deposition of the conducting material.

    Abstract translation: 在半导体器件的制造中使用导电材料在下面的导电区域上的无电沉积。 无电沉积提供了形成导电层,填充窗口并提供互连和端子的选择性和添加过程。 导电材料选择性地沉积在催化下面的表面上。 当底层表面不催化时,使用活化步骤使表面催化。 在基底下表面是基底的情况下,在基底上形成接触区域以进行导电材料的无电沉积。

    Control of electroless plating baths
    6.
    发明授权
    Control of electroless plating baths 失效
    化学镀浴的控制

    公开(公告)号:US4814197A

    公开(公告)日:1989-03-21

    申请号:US926362

    申请日:1986-10-31

    CPC classification number: C23C18/1675 C23C18/1683

    Abstract: Methods of analyzing and controlling an electroless plating solution are described which provide for real time control of the electroless plating solution, e.g., an electroless copper bath whose main constituents are copper sulfate, complexing agent, formaldehyde, a hydroxide and a stabilizer. All necessary constituent concentrations, particularly the reducing agent concentration, are measured in situ and may be used to analyze and/or control the composition of the bath. A control cycle of less than one minute is required and hence real time control is achieved. The in situ measurements also provide quality indicia of the copper quality factors which are likewise used to control composition of the bath. Data from the in situ measurements is fed to a computer which, in turn, controls additions to the bath to maintain a bath composition which provides good quality electrolessly formed, copper plating.

    Abstract translation: 描述了分析和控制化学镀溶液的方法,其提供化学镀溶液的实时控制,例如其主要成分是硫酸铜,络合剂,甲醛,氢氧化物和稳定剂的化学镀铜浴。 所有必需的成分浓度,特别是还原剂浓度,都是原位测量的,可用于分析和/或控制浴的组成。 需要小于1分钟的控制周期,因此实现了实时控制。 原位测量还提供同样用于控制浴的组成的铜质量因子的质量标记。 来自原位测量的数据被馈送到计算机,计算机进而控制对浴的添加以保持提供优质无电镀铜镀液的浴组合物。

    Heat shock resistant printed circuit board assemblies
    10.
    发明授权
    Heat shock resistant printed circuit board assemblies 失效
    耐热冲击印刷电路板组件

    公开(公告)号:US4303798A

    公开(公告)日:1981-12-01

    申请号:US34210

    申请日:1979-04-27

    Applicant: Milan Paunovic

    Inventor: Milan Paunovic

    Abstract: The heat shock resistance of plated through holes in printed circuit assemblies is significantly increased by using as the through hole plating a special multi-layered arrangement comprising at least two layers of an electrically conductive metal in combination with at least one intermediate layer of a different electrically conductive metal. In preferred embodiments, the through hole plating comprises at least two layers of a stressed metal together with at least one intermediate layer of a metal having a stress in counteraction to that of one or more of the other metal layers. These through hole platings are capable of exposure to conditions of heat shock, such as encountered during high temperature soldering, without developing cracks resulting in breaks in the conducting pathways and failures.

    Abstract translation: 通过使用特殊的多层布置,包括至少两层导电金属与至少一个不同电学中间层的组合,使用印刷电路组件中电镀通孔的耐热冲击性 导电金属。 在优选实施例中,通孔镀层包括至少两层应力金属以及至少一个金属中间层,其具有与一个或多个其它金属层的应力相反的应力。 这些通孔电镀能够暴露于热冲击的条件下,例如在高温焊接期间遇到的,而不会产生导致导电路径和故障中断的裂纹。

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