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    • 29. 发明授权
    • Printed wiring board
    • 印刷电路板
    • US09549460B2
    • 2017-01-17
    • US14717456
    • 2015-05-20
    • FUJIKURA LTD
    • Hirohito WatanabeTaiji Ogawa
    • H05K1/00H05K1/02H05K1/03H01P3/08
    • H05K1/0216H01P3/085H05K1/0225H05K1/0237H05K1/025H05K1/0393H05K2201/0715H05K2201/09027H05K2201/09681H05K2201/09727
    • To suppress occurrence of a difference in transmission time due to a difference in length between signal lines, there is provided a printed wiring board having: an insulating substrate (10); a first signal line (L31A) that constitutes differential signal lines formed on the insulating substrate (10) and includes a curved portion; a second signal line (L31B) provided along the first signal line (L31A) and side by side inside the curved portion; and a ground layer (30) formed for the first signal line (L31A) and the second signal line (L31B) via an insulating material (10). The ground layer (30) includes a first ground layer (G31A) corresponding to a first region (D1) and a second ground layer (G31B) corresponding to a second region (D2). The first region (D1) is defined based on the first signal line (L31A) and has a first predetermined width (W31A). The second region (D2) is defined based on the second signal line (L31B) and has a second predetermined width (W31B). The first ground layer (G31A) has a remaining ratio lower than a remaining ratio of the second ground layer (G31B).
    • 为了抑制由于信号线之间的长度差导致的传输时间差的发生,提供了一种印刷线路板,其具有:绝缘基板(10); 第一信号线(L31A),其构成形成在绝缘基板(10)上并包括弯曲部分的差分信号线; 沿着第一信号线(L31A)设置并并列在弯曲部分内的第二信号线(L31B); 以及经由绝缘材料(10)为第一信号线(L31A)和第二信号线(L31B)形成的接地层(30)。 接地层(30)包括对应于第一区域(D1)的第一接地层(G31A)和对应于第二区域(D2)的第二接地层(G31B)。 第一区域(D1)基于第一信号线(L31A)定义并具有第一预定宽度(W31A)。 第二区域(D2)基于第二信号线(L31B)被定义并且具有第二预定宽度(W31B)。 第一接地层(G31A)的剩余比率比第二接地层(G31B)的剩余率低。