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    • 15. 发明授权
    • Producing a covered through substrate via using a temporary cap layer
    • 通过使用临时盖层生产覆盖的基板
    • US07704881B2
    • 2010-04-27
    • US12092605
    • 2006-11-03
    • Johan H. KlootwijkAntonius L. A. M. KemmerenRonald DekkerEric Cornelis Egbertus Van GrunsvenFreddy Roozeboom
    • Johan H. KlootwijkAntonius L. A. M. KemmerenRonald DekkerEric Cornelis Egbertus Van GrunsvenFreddy Roozeboom
    • H01L21/44
    • H01L21/76898H01L21/764H01L23/481H01L2924/0002H01L2924/00
    • The present invention relates to a method for producing a substrate with at least one covered via that electrically and preferably also thermally connects a first substrate side with an opposite second substrate side. The processing involves forming a trench on a the first substrate side remains and covering the trench with a permanent layer on top of a temporary, sacrificial cap-layer, which is decomposed in a thermal process step. The method of the invention provides alternative ways to remove decomposition products of the sacrificial cap-layer material without remaining traces or contamination even in the presence of the permanent layer. This is, according to a first aspect of the invention, achieved by providing the substrate trench with an overcoat layer that has holes. The holes in the overcoat layer leave room for the removal of the decomposition products of the cap-layer material. According to the second aspect of the invention, opening the covered trench from the second substrate side and allowing the cap-layer material to be removed through that opening provides a solution. Both methods of the present invention are based on the common idea of using a temporary cap-layer even in a situation where the substrate opening is permanently covered before the removal of the temporary cap-layer.
    • 本发明涉及一种制造具有至少一个覆盖通孔的基板的方法,所述至少一个覆盖通孔电连接并优选地将第一基板侧与相对的第二基板侧热连接。 所述处理涉及在第一基板侧上形成沟槽,并在热处理步骤中分解的临时牺牲盖层的顶部上保留并覆盖具有永久层的沟槽。 本发明的方法提供了即使在存在永久层的情况下除去牺牲帽层材料的分解产物而不留下痕迹或污染物的替代方法。 根据本发明的第一方面,这是通过为基底沟槽提供具有孔的外涂层而实现的。 外涂层中的孔留下去除盖层材料的分解产物的空间。 根据本发明的第二方面,从第二基板侧打开被覆盖的沟槽并且允许通过该开口去除盖层材料提供了一种解决方案。 本发明的两种方法都是基于即使在去除临时盖层之前基材开口被永久地覆盖的情况下使用临时盖层的常见思想。