Multilayer wiring board and method of manufacturing the same
    8.
    发明专利
    Multilayer wiring board and method of manufacturing the same 有权
    多层接线板及其制造方法

    公开(公告)号:JP2013153121A

    公开(公告)日:2013-08-08

    申请号:JP2012128574

    申请日:2012-06-06

    Abstract: PROBLEM TO BE SOLVED: To reduce a via-hole resistance, and increase the strength of a via-hole part in a multilayer wiring board in which a conductive paste having copper powder and solder powder is used for a via-hole conductor.SOLUTION: The multilayer wiring board 110 has: an electrically insulative base material 130 composed of an incompressible member; a plurality of wiring lines 120; and a via-hole conductor 140. The via-hole conductor 140 comprises: a resin part 200; and a metal part 190 including at least a first metal region 160 consisting primarily of copper, a second metal region 170 consisting primarily of a tin-copper alloy, and a third metal region 180 consisting primarily of bismuth. The second metal region 170 is larger than a discrete piece of the first metal region 160 and a discrete piece of the third metal region 180; in the second metal region 170, such pieces of the first and third metal regions 160 and 180 are sprinkled so as not to be in contact with one another. The second metal region 170 contains an intermetallic compound CuSnand an intermetallic compound CuSn; the ratio of CuSn/CuSn is 0.10 or less.

    Abstract translation: 要解决的问题:为了减少通孔电阻,并且增加了具有铜粉末和焊料粉末的导电浆料用于通孔导体的多层线路板中的通路孔部分的强度。解决方案: 多层布线板110具有:由不可压缩构件构成的电绝缘基材130; 多条布线120; 和通孔导体140.通孔导体140包括:树脂部分200; 以及金属部件190,其至少包括主要由铜组成的第一金属区域160,主要由锡 - 铜合金组成的第二金属区域170和主要由铋组成的第三金属区域180。 第二金属区域170大于第一金属区域160的分立件和第三金属区域180的分立件; 在第二金属区域170中,第一金属区域160和第三金属区域180的这些块被喷洒以不彼此接触。 第二金属区域170包含金属间化合物CuSn和金属间化合物CuSn; CuSn / CuSn的比例为0.10以下。

    Electronic apparatus and hard disk drive

    公开(公告)号:JP2011210307A

    公开(公告)日:2011-10-20

    申请号:JP2010076046

    申请日:2010-03-29

    Abstract: PROBLEM TO BE SOLVED: To provide an electronic apparatus which can improve reliability.SOLUTION: The electronic apparatus includes: a case 12; a printed circuit board contained in the case 12 and provided with a through-hole 21; and a fixing member 16 including a shaft 16A inserted in the through-hole 21 and a head 16B located at one end of the shaft 16A, and fixing the printed circuit board and the case 12. The electronic apparatus also includes: copper foil 23 provided on the printed circuit board; and a cover film 24 including an opening 25 configured to expose a part of the copper foil 23. The opening 25 is located at a position which is to be covered with the head 16B, and the cover film 24 covers the copper foil 23 at positions other than the position of the opening 25. The electronic apparatus further includes a conductive material provided on the copper foil 23 inside the opening 25 and configured to electrically connect the head 16B and the copper foil 23.

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