Suspension board with circuit and producing method thereof
AssigneeNitto Denko Corporation
InventorMasaki Mizutani
Life of this patent
Estimating the term…
Abstract
A suspension board with circuit includes a gimbal portion. The gimbal portion includes a tongue portion formed at the inner side of the opening for being mounted with a slider mounted with a magnetic head for being electrically connected to the conductive layer, an outrigger portion formed at the outer side of the opening to support the tongue portion, and a passing portion passing through the opening of the gimbal portion and/or an outer side region of the outrigger portion. The passing portion includes the conductive layer and the insulating layer covering the conductive layer. The thickness of a lower half portion of the insulating layer in the passing portion is the same as that of an upper half portion thereof.
Claims7
A suspension board with circuit comprising:
- a metal supporting layer, an insulating layer formed on the metal supporting layer, and a conductive layer formed on the insulating layer, wherein
- a gimbal portion is provided in the suspension board with circuit and
- an opening penetrating the metal supporting layer in the up-down direction is formed in the gimbal portion, and
- the gimbal portion includes
- a tongue portion formed at an inner side of the opening for being mounted with a slider mounted with a magnetic head for being electrically connected to the conductive layer,
- an outrigger portion formed at an outer side of the opening to support the tongue portion, and
- a passing portion passing through the opening of the gimbal portion and/or an outer side region of the outrigger portion, wherein
- the passing portion includes the conductive layer and the insulating layer covering the conductive layer, and
- the thickness of a lower half portion of the insulating layer in the passing portion is the same as that of an upper half portion thereof.
A method for producing a suspension board with circuit,
- provided with a gimbal portion including a tongue portion on which a slider mounted with a magnetic head is to be mounted and an outrigger portion that supports the tongue portion,
- includes the steps of preparing a metal supporting layer,
- forming an insulating layer on the metal supporting layer,
- forming a conductive layer on the insulating layer, and
- forming, in the metal supporting layer, an opening that corresponds to the conductive layer in the gimbal portion and defines the tongue portion from the outrigger portion, wherein
- in the step of forming the insulating layer,
- the insulating layer is formed so that the insulating layer covers the conductive layer and the thickness of a lower half portion of the insulating layer in a passing portion passing through the opening and/or an outer side region of the outrigger portion is the same as that of an upper half portion of the insulating layer in the passing portion.
Dependencies are inferred from the claim text.