发明名称 |
Wiring board and method for manufacturing the same |
摘要 |
A wiring board has a first resin insulation layer, a first conductive pattern formed on the first resin insulation layer, a second resin insulation layer formed on the first conductive pattern and having an opening portion exposing at least a portion of the first conductive pattern, a second conductive pattern formed on the second resin insulation layer, and a via conductor formed in the opening portion of the second resin insulation layer and electrically connecting the first conductive pattern and the second conductive pattern. The via conductor has a side surface extending between the first conductive pattern and the second conductive pattern and a bent portion where an inclination of the side surface of the via conductor changes in a depth direction of the via conductor. |
申请公布号 |
US8759691(B2) |
申请公布日期 |
2014.06.24 |
申请号 |
US201113174837 |
申请日期 |
2011.07.01 |
申请人 |
Ibiden Co., Ltd. |
发明人 |
Ouchi Shinji;Yamada Shigeru;Terui Makoto;Shizuno Yoshinori |
分类号 |
H05K1/11 |
主分类号 |
H05K1/11 |
代理机构 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. A wiring board, comprising:
a first resin insulation layer; a first conductive pattern formed on the first resin insulation layer; a second resin insulation layer formed on the first conductive pattern and having an opening portion exposing at least a portion of the first conductive pattern; a second conductive pattern formed on the second resin insulation layer; and a via conductor formed in the opening portion of the second resin insulation layer and electrically connecting the first conductive pattern and the second conductive pattern, wherein the via conductor has a side surface extending between the first conductive pattern and the second conductive pattern and a bent portion where an inclination of the side surface of the via conductor changes in a depth direction of the via conductor, the via conductor tapers from the bent portion toward the first conductive pattern and includes a tapered portion decreasing in size from the bent portion toward the first conductive pattern and a non-tapered portion such that the bent portion forms a boundary between the tapered portion and a non-tapered portion, the second resin insulation layer is formed with a plurality of layers having different elastic coefficients, and the bent portion of the via conductor is formed in a layer having the lowest elastic coefficient among the plurality of layers forming the second resin insulation layer.
|
地址 |
Ogaki-shi JP |