TRANSMISSION CABLE - SONY CHEMICALS & INFORMATION D

Title:

TRANSMISSION CABLE

Document Type and Number:

WIPO Patent Application WO/2007/083429

Kind Code:

A1

Abstract:

A transmission cable has a plurality of signal lines (2) formed on one side of an insulating layer (1), and grounding lines (3) are formed between those signal lines (2). The grounding lines (3) are electrically connected through metal bumps (5) buried and formed in the insulating layer (1), with a shielding layer (4) formed on the back side of the insulating layer (1) and a noise suppressing layer (6) having a higher electric resistance than that of the shielding layer (4). The noise suppressing layer (6) has a function to suppress an unnecessary radiation and/or a noise, and a function as an etching barrier layer to become an etching stopper at the step of forming the metal bumps (5). As a result, it is possible to simplify the manufacturing process and to reduce the manufacturing cost, and to suppress the increase in the electric resistance between the grounding lines and the shielding layer and in the connection resistance. Thus, it is possible to provide a highly reliable transmission cable capable of performing a high-speed transfer and a large-capacity transfer.

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Inventors:

KOBAYASHI KAZUYOSHI (JP)
HANAMURA KENICHIROU (JP)
HORI TOMOMITSU (JP)

Application Number:

PCT/JP2006/321836

Publication Date:

July 26, 2007

Filing Date:

November 01, 2006

Export Citation:

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Assignee:

SONY CHEMICALS & INFORMATION D (JP)
KOBAYASHI KAZUYOSHI (JP)
HANAMURA KENICHIROU (JP)
HORI TOMOMITSU (JP)

International Classes:

H01B11/00; H01B7/08; H01B11/08; H01P3/04; H01P3/08; H05K9/00

Domestic Patent References:

WO2006003732A1

2006-01-12

Foreign References:

JP2002117726A	2002-04-19
JPH11162267A	1999-06-18
JP2002117726A	2002-04-19
JP2005203509A	2005-07-28

Other References: