发明名称 Printed circuit boards
摘要 Ground connection between an electromagnetic wave shielding layer 6 and a printed circuit 2 formed on a printed circuit board 7 is effected via apertures in a plurality of insulating layers 3a-3c formed between the shielding layer 6 and the printed circuit 2. The apertures in the insulating layers 3a-3c increase in diameter from the printed circuit 2 to the shielding layer 6 so as to improve the connection. <IMAGE>
申请公布号 GB2244867(A) 申请公布日期 1991.12.11
申请号 GB19910008306 申请日期 1991.04.18
申请人 * NIPPON CMK CORP. 发明人 HIROTAKA * OKONOGI;KATSUTOMO * NIKAIDO;JUNICHI * ICHIKAWA
分类号 H05K1/02;H05K3/46;H05K9/00 主分类号 H05K1/02
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