Wired-circuit-board assembly sheet

• US 20070170911A1
• Filed: 01/18/2007
• Published: 07/26/2007
• Est. Priority Date: 01/25/2006
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Kataoka, Kouji, Ohsawa, Tetsuya, Takeuchi, Yoshihiko
• Granted Patent: US 7,649,143 B2
• Time in Patent Office: Days
• US Class Current: 324/763.10
• CPC Class Codes: G11B 5/484 Integrated arm assemblies, e.g. formed by material deposition or by etching from single piece of metal or by lamination of materials forming a single arm/suspension/head unit
• CPC Class Codes: G11B 5/486 with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly
• CPC Class Codes: H05K 1/0269 for visual or optical inspection
• CPC Class Codes: H05K 1/056 the metal substrate being covered by an organic insulating layer
• CPC Class Codes: H05K 2201/09127 PCB or component having an integral separable or breakable part
• CPC Class Codes: H05K 2201/0969 Apertured conductors
• CPC Class Codes: H05K 2201/09781 Dummy conductors, i.e. not used for normal transport of current; Dummy electrodes of components
• CPC Class Codes: H05K 3/225 Correcting or repairing of printed circuits H05K1/0292, H05K3/222, H05K3/288, H05K3/4685 take precedence

Abstract

A wired-circuit-board assembly sheet is provided having removable portions that are easily removable without any generation of metal powder. The wired-circuit-board assembly sheet comprises a plurality of suspension boards with circuits, distinguishing marks for distinguishing defectiveness of the suspension boards with circuits, and a supporting sheet for supporting the suspension boards with circuits and the distinguishing marks, wherein openings are formed in the supporting sheet, and removable portions which are to be removed when the suspension boards with circuits are judged defective are located in the openings and also supported by the supporting sheet via joint portions formed of resin.

Claims

1. A wired-circuit-board assembly sheet, comprising:

a plurality of wired circuit boards;

distinguishing marks provided for distinguishing defectiveness of the wired circuit boards; and

a supporting sheet for supporting the wired circuit boards and the distinguishing marks;

wherein openings are formed in the supporting sheet where the distinguishing marks are provided, and

the distinguishing marks include removable portions provided in the openings for indicating whether the wired circuit boards are defective or non-defective, and joint portions formed of resin for joining the removable portions and the supporting sheet.

2. The wired-circuit-board assembly sheet according to claim 1, the wired circuit board, comprising:

a metal supporting layer;

an insulating base layer formed on the metal supporting layer;

a conductive pattern formed on the insulating base layer; and

an insulating cover layer formed on the insulating base layer to cover the conductive pattern,

wherein the supporting sheet comprises the metal supporting layer, and

the joint portion comprises the insulating base layer and/or the insulating cover layer.

3. The wired-circuit-board assembly sheet according to claim 1, the joint portion comprising:

a supporting-sheet-side end portion connected to the supporting sheet;

a removable-portion-side end portion connected to the removable portion;

wherein at least either of the supporting-sheet-side end portion and the removable-portion-side end portion has a curved portion formed to generally increase in width from inside to outside in a curved form in a direction in which the supporting-sheet-side end portion and the removable-portion-side end portion are opposite to each other.

4. The wired-circuit-board assembly sheet according to claim 1, the distinguishing mark, comprising an outer frame portion formed of resin which is provided to extend continuously from the joint portion to surround the opening

wherein the outer frame portion is formed to expose an end portion of the opening in the supporting sheet.

5. The wired-circuit-board assembly sheet according to claim 1, the joint portion comprising:

a supporting-sheet-side end portion connected to the supporting sheet; and

a removable-portion-side end portion connected to the removable portion

and are formed to generally decrease in width from the supporting-sheet-side end portion to the removable-portion-side end portion or from the removable-portion-side end portion to the supporting-sheet-side end portion.

6. The wired-circuit-board assembly sheet according to claim 1,

wherein the wired circuit board is a suspension board with circuit.