Method of manufacturing lead frame having inner lead connected to outer
lead by metal etch stop layer
    4.
    发明授权
    Method of manufacturing lead frame having inner lead connected to outer lead by metal etch stop layer 失效
    制造引线框架的方法,其具有通过金属蚀刻停止层连接到外部引线的内部引线

    公开(公告)号:US5937278A

    公开(公告)日:1999-08-10

    申请号:US732817

    申请日:1996-10-15

    摘要: A method of manufacturing a lead frame comprises the steps of preparing a three-layered material comprising a metal base, an etching stopper layer made of a metal material different from that of the metal layer formed on a first surface of the metal base and a chromium layer formed on the etching stopper layer, forming a resist layer having a negative pattern relative to an inner lead to be formed on the chromium layer of the three-layered material, forming an inner lead by plating copper by using the resist layer as a mask, forming an outer lead on the metal base, removing a back of a region in which an inner lead of the metal base is formed by etching, removing the etching stopper layer, and removing the chromium layer.

    摘要翻译: 制造引线框架的方法包括以下步骤:制备包括金属基底的三层材料,由与金属基底的第一表面上形成的金属层不同的金属材料制成的蚀刻阻挡层和铬 形成在蚀刻停止层上的层,形成相对于在三层材料的铬层上形成的内部引线具有负图案的抗蚀剂层,通过使用抗蚀剂层作为掩模,通过电镀铜形成内部引线 在金属基底上形成外部引线,通过蚀刻除去金属基底的内部引线的区域的背面,去除蚀刻停止层,以及去除铬层。

    Method of manufacturing lead frame
    6.
    发明授权
    Method of manufacturing lead frame 失效
    制造引线框架的方法

    公开(公告)号:US5901436A

    公开(公告)日:1999-05-11

    申请号:US730782

    申请日:1996-10-16

    CPC分类号: H01L21/4828 Y10T29/49121

    摘要: Leads are formed on a surface of an etching stop film of a base, and holes are defined in the base and a region of a substrate which corresponds to a lead-forming region is thinned by selective etching on both upper and lower surfaces of the base. A lead holder film having a device hole and an outer lead bonding slit is applied to the upper surface of the base. The thinned region of the substrate is removed by selective etching on the lower surface of the base, and the etching stop film is etched away.

    摘要翻译: 引线形成在基底的蚀刻停止膜的表面上,并且在基底中限定孔,并且通过在基底的上表面和下表面上的选择性蚀刻使对应于引线形成区的基底的区域变薄 。 具有器件孔和外部引线接合狭缝的引线保持器膜被施加到基座的上表面。 通过在基底的下表面上的选择性蚀刻去除衬底的变薄区域,蚀刻掉蚀刻停止膜。