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Suspension board with circuit and producing method thereof

專利號
US10028378B2
公開日期
2018-07-17
申請人
NITTO DENKO CORPORATION（JP Osaka）
發(fā)明人
Hiroyuki Tanabe; Naohiro Terada; Yuu Sugimoto; Daisuke Yamauchi
IPC分類
H05K1/05; H05K1/11; H05K1/18; G11B5/48; H05K3/40; H05K3/44; H05K1/02; H05K1/03
技術(shù)領域
insulating,layer,terminal,base,side,region,board,portion,in,pedestal
地域： Osaka

摘要

A suspension board with circuit includes a metal supporting board, a base insulating layer disposed at one side in a thickness direction of the metal supporting board, and a conductor layer disposed at one side in the thickness direction of the base insulating layer and including a connecting terminal electrically connected to a slider. The base insulating layer has a terminal region, when projected in the thickness direction, overlapped with at least the connecting terminal and a circumferential region not overlapped with the terminal region and around the terminal region, and the thickness of the terminal region is thicker than that of the circumferential region.

說明書

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority from Japanese Patent Application No. 2015-242585 filed on Dec. 11, 2015, the contents of which are hereby incorporated by reference into this application.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a suspension board with circuit, to be specific, to a suspension board with circuit used for a hard disk drive, and a producing method thereof.

Description of Related Art

Conventionally, a suspension board with circuit on which a slider including a magnetic head is mounted is mounted on a hard disk drive.

In such a suspension board with circuit, a head-side terminal is electrically connected to a terminal of the magnetic head of the slider by a solder ball (ref: for example, Japanese Unexamined Patent Publication No. 2012-099204).

SUMMARY OF THE INVENTION

In the suspension board with circuit described in Japanese Unexamined Patent Publication No. 2012-099204, however, the bead-side terminal is spaced apart from the terminal of the magnetic head in a thickness direction. When the space therebetween is large, there may be a case where the contact area of the head-side terminal and the terminal of the magnetic head cannot be ensured at the time of melting of the solder ball, causing a contact failure.

It is an object of the present invention to provide a suspension board with circuit that is capable of surely connecting a connecting terminal to a terminal of a slider, and a producing method thereof.

權(quán)利要求

1
What is claimed is:1. A suspension board with circuit comprising:a metal supporting board, a base insulating layer disposed at one side in a thickness direction of the metal supporting board, and a conductor layer disposed at one side in the thickness direction of the base insulating layer and including a connecting terminal electrically connected to a slider, wherein:the base insulating layer includes a first base insulating layer disposed at the one side in the thickness direction of the metal supporting board and a second base insulating layer covering the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board,the base insulating layer has a terminal region, when projected in the thickness direction, overlapped with at least the connecting terminal and a circumferential region not overlapped with the terminal region and around the terminal region,in an entire region of the base insulating layer, the conductor layer is not located between the first base insulating layer and the second base insulating layer, andthe thickness of the terminal region is thicker than that of the circumferential region.2. The suspension board with circuit according to claim 1, whereinthe terminal region includesa first terminal region-insulating layer made of the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board anda second terminal region-insulating layer made of the second base insulating layer and disposed at one side in the thickness direction of the first terminal region-insulating layer; andthe circumferential region includes at least a second circumferential region-insulating layer made of the second base insulating layer and disposed at the one side in the thickness direction of the metal supporting board.3. The suspension board with circuit according to claim 2 further comprising:a cover insulating layer covering the conductor layer so as to expose the connecting terminal and disposed at the one side in the thickness direction of the base insulating layer and a pedestal supporting the slider, whereinthe pedestal includesa first base pedestal layer made of the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board,a second base pedestal layer made of the second base insulating layer and disposed at one side in the thickness direction of the first base pedestal layer, anda cover pedestal layer made of the cover insulating layer and disposed at one side in the thickness direction of the second base pedestal layer.4. The suspension board with circuit according to claim 1, whereinthe terminal region includesa first terminal region-insulating layer made of the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board anda second terminal region-insulating layer made of the second base insulating layer and disposed at one side in the thickness direction of the first terminal region-insulating layer; andthe circumferential region includes at least a first circumferential region-insulating layer made of the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board.5. The suspension board with circuit according to claim 4 further comprising:a cover insulating layer covering the conductor layer so as to expose the connecting terminal and disposed at the one side in the thickness direction of the base insulating layer and a pedestal supporting the slider, whereinthe pedestal includesa first base pedestal layer made of the first base insulating layer and disposed at the one side in the thickness direction of the metal supporting board,a second base pedestal layer made of the second base insulating layer and disposed at one side in the thickness direction of the first base pedestal layer, anda cover pedestal layer made of the cover insulating layer and disposed at one side in the thickness direction of the second base pedestal layer.
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