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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(lǐng)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

In the method, as shown in FIG. 4A, first, the metal supporting board 8 is prepared.

Next, as shown in FIG. 4B, the first base insulating layer 26 is formed on the metal supporting board 8.

To be specific, the first base insulating layer 26 is formed on the metal supporting board 8 in a pattern corresponding to the first terminal region-insulating layer 28, the one pair of first front-side base layers 29 (ref: FIG. 3A), and the one pair of first rear-side base layers 30.

In order to form the first base insulating layer 26 including the first terminal region-insulating layer 28, the one pair of first front-side base layers 29 (ref: FIG. 3A), and the one pair of first rear-side base layers 30, a varnish of a photosensitive insulating material is applied onto the metal supporting board 8 to be then dried, thereby forming a base film.

Thereafter, the obtained base film is exposed to light via a photomask that is not shown. The photomask includes a light shielding portion and a light fully transmitting portion in a pattern. The light fully transmitting portion to a portion where the first base insulating layer 26 is formed and the light shielding portion to a portion where the first base insulating layer 26 is not formed are disposed in opposed relation to the base film to be then exposed to light.

權(quán)利要求

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