| 发明名称 |
Printed circuit board and electric components |
| 摘要 |
<p>A printed circuit board has: a base material layer having a first via hole; and an insulating layer having a second via hole, the insulating layer being provided on one surface of the base material layer, wherein a cross-sectional area of the second via hole is smaller than a cross-sectional area of said first via hole, and wherein the first and second via holes are filled with a conductive material. <IMAGE></p> |
| 申请公布号 |
EP0851724(A2) |
申请公布日期 |
1998.07.01 |
| 申请号 |
EP19970122824 |
申请日期 |
1997.12.23 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TSUKAMOTO, MASAHIDE |
| 分类号 |
H05K3/20;H01L21/60;H01L23/12;H01L23/31;H01L23/498;H05K1/11;H05K1/18;H05K3/00;H05K3/28;H05K3/40;H05K3/46;(IPC1-7):H05K3/40 |
主分类号 |
H05K3/20 |
| 代理机构 |
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代理人 |
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