Terminal capable of stopping flow of oozed conductive adhesive, flexure having the terminal, and head suspension having the flexure

Patent metadata

Field	Value
Publication number	US-9076957-B2
Application number	US-201313828570-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 30, 2012
Publication date	Jul 7, 2015
Grant date	Jul 7, 2015

Abstract

A terminal extending from a wiring member to face an electrode of a piezoelectric element and including a proximal end part and a distal end part with respect to the wiring member, the distal end part being connected to the electrode of the piezoelectric element through a conductive adhesive, comprising an insulating layer that faces the electrode of the piezoelectric element; a wiring layer laid on the insulating layer and connected to the electrode at the distal end part; and at least one liquid stopping recess provided on a surface facing the electrode at the proximal end part, the liquid stopping recess spanning between both edges of the insulating layer in an direction intersecting an extending direction of the proximal end part.

First claim

What is claimed is:

1. A terminal extending from a wiring member to face an electrode of a piezoelectric element and including a proximal end part and a distal end part with respect to the wiring member, the distal end part being connected to the electrode of the piezoelectric element through a conductive adhesive, comprising:
an insulating layer that faces the electrode of the piezoelectric element;
a wiring layer laid on the insulating layer and connected to the electrode at the distal end part; and
at least one liquid stopping recess provided on a surface of the insulating layer facing the electrode at the proximal end part, the liquid stopping recess spanning between both edges of the insulating layer in an direction intersecting an extending direction of the proximal end part.

2. The terminal according to claim 1 , wherein the liquid stopping recess is composed of a continuous plurality of recesses formed on the insulating layer by photolytic degradation or of a slit-like recess formed in the insulating layer by etching.

3. The terminal according to claim 1 , further comprising:
a cover insulating layer laid on the wiring layer.

4. The terminal according to claim 1 , wherein a plurality of the liquid stopping recesses are parallelly provided on the insulating layer in the extending direction.

5. The terminal according to claim 1 , further comprising:
a liquid stopping wall provided at a portion of the proximal end part closer to the wiring member with respect to the liquid stopping recess, the liquid stopping wall being interposed between the insulating layer and the piezoelectric element and spanning between both the edges of the insulating layer in the direction intersecting the extending direction.

6. The terminal according to claim 1 , wherein at least a part of the proximal end part closer to the wiring member with respect to the liquid stopping recess narrows in the direction intersecting the extending direction relative to the distal end part and entirely curves.

7. The terminal according to claim 1 , further comprising:
a shifting part formed on a part of the proximal end part closer to the wiring member with respect to the liquid stopping recess, the shifting part shifted away from the electrode of the piezoelectric element relative to the distal end part.

8. The terminal according to claim 1 , further comprising:
a hole formed through the insulating layer at the distal end part to expose the wiring layer toward the electrode of the piezoelectric element, the hole filled with the conductive adhesive; and
a liquid stopping member disposed around the hole and interposed between the insulating layer and the electrode of the piezoelectric element.

9. A flexure for supplying power to a piezoelectric element attached to a head suspension, the flexure being a wiring member that comprises the terminal according to claim 1 .

10. A head suspension having the flexure according to claim 9 , comprising;
a base;
a load beam supported with the base; and
a head for reading and writing data arranged on the flexure that is attached to the load beam; and
a piezoelectric element arranged between the base and the load beam and deformable in accordance with an applied voltage from the flexure to minutely move the head in a sway direction relative to the base.

Assignees

• Nhk Spring Co Ltd

Inventors

• Ikeji Yoichi
• Soga Jun
• Fuchino Hideki
• Ono Hiroshi
• Kamijo Hiroaki

Classifications

• H01L41/0475 Primary

  Electricity · mapped topic

• H05K1/00

  Printed circuits · CPC title

• G11B5/4873 Primary

  the arm comprising piezoelectric or other actuators for adjustment of the arm · CPC title

• H10N30/875 Primary

  Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins · CPC title