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Rolled copper foil and manufacturing method of rolled copper foil

A technology of rolling copper foil and rolling surface, which is applied in the field of rolling copper foil, can solve the problems of reduced manufacturing efficiency of rolled copper foil, difficult rolling processing, difficult reduction, etc., and achieves low cost and excellent bending characteristics Effect

Inactive Publication Date: 2009-07-15
SH COPPER PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the cold rolling process, since the higher the total reduction, the harder the material (copper foil) due to work hardening, it becomes difficult to control the reduction for each pass, and the manufacturing efficiency of rolled copper foil decreases. The problem
Specifically, if the total reduction of cold rolling reaches more than about 90% (especially more than 93%), the control of the reduction of each pass and the rolling process itself all become difficult rapidly.

Method used

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  • Rolled copper foil and manufacturing method of rolled copper foil
  • Rolled copper foil and manufacturing method of rolled copper foil
  • Rolled copper foil and manufacturing method of rolled copper foil

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0053] (Measurement of in-plane orientation)

[0054] The rolled copper foil of the present embodiment is a rolled copper foil before recrystallization annealing after the final cold rolling process, and is characterized in that the results obtained by X-ray diffraction pole pattern measurement based on the rolled surface are present in β At least 90±5 each of the angles 0 The α angle determined by the existence of the pole diagram = 45 0 {220} of the copper crystal obtained from the β-axis scan Cu Surface diffraction peaks and show 4th order symmetry. For example, the rolling direction of the copper foil measured by the pole diagram is set to β=0 0 , The centers of the 4th-order symmetric diffraction peaks are β≌0 0 , 90 0 , 180 0 , 270 0 , 360 0 .

[0055] In the results of the above-mentioned in-plane orientation measurement, {220}Cu plane diffraction peaks do not show each 90±5 0 In the case of 4th order symmetry, even if recrystallization annealing is performed, a rolled copp...

no. 2 approach

[0057] (Standardized strength)

[0058] The rolled copper foil of the present embodiment is a rolled copper foil before recrystallization annealing after the final cold rolling process, and is characterized in that it is measured by an X-ray diffraction pole diagram based on the above-mentioned rolled surface. The α angle measured by the pole diagram is the horizontal axis, and the copper crystal obtained by scanning the β axis at each α angle is {220} Cu When the normalized intensity of the surface diffraction peak is represented by a curve on the vertical axis, when α=25∽35 0 There is the maximum value P of the above-mentioned normalized intensity between α=40∽50 0 There is the maximum value Q of the above-mentioned standardized intensity between α=85∽90 0 Between the above-mentioned normalization intensity monotonously increase, the above-mentioned maximum value P and the above-mentioned maximum value Q, and the above-mentioned α=90 0 The value R of the above-mentioned normaliz...

no. 3 approach

[0067] (2θ / θ measurement)

[0068] The rolled copper foil of the present embodiment is characterized in that, in the state before the recrystallization annealing after the final cold rolling step, the diffraction peak of the copper crystal is obtained by the X-ray diffraction 2θ / θ measurement of the rolled surface. The intensity I is "I{200} Cu ≥I{220} Cu ".

[0069] As described above, the rolled copper foil of the present invention is in the state before the recrystallization annealing after the final cold rolling process, {200} Cu The surface is oriented in the rolled surface of the copper foil. This means that there is a considerable amount of {200} on the rolled surface of the polycrystalline copper foil Cu Face-oriented grains. image 3 This is an example of the results of the X-ray diffraction 2θ / θ measurement of the rolled surface in the rolled copper foil of the present invention after the final cold rolling step and before the recrystallization annealing.

[0070] From i...

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Abstract

A rolled copper foil, according to the present invention, obtained after a final cold rolling step but before recrystallization annealing includes a group of crystal grains which exhibits four-fold symmetry in results obtained by X-ray diffraction (XRD) pole figure measurement with respect to a rolled surface. In the XRD pole figure measurement, at least four peaks of a {220}Cu plane diffraction of a copper crystal due to the group of crystal grains exhibiting the four-fold symmetry, which is obtained during beta axis scanning with an alpha angle set to 45 DEG , appear at intervals of 90 DEG +-5 DEG along the beta angle.

Description

Technical field [0001] The present invention relates to rolled copper foil, and particularly relates to rolled copper foil having excellent bending characteristics suitable for flexible wiring components such as flexible printed circuit boards. Background technique [0002] Flexible printed circuit boards (Flexible Printed Circuit, hereinafter referred to as FPC) have the advantages of thin thickness and excellent flexibility, and therefore have a high degree of freedom in the manner of mounting electronic devices. Therefore, FPCs are now widely used in folding mobile phones, moving parts of digital cameras, printer heads, etc., as well as hard disk drives (HDD-Hard Disk Drive), digital versatile disks (DVD-Digital Versatile Disk), and compression Wiring of movable parts of CD-Compact Disks and other devices related to optical disks. [0003] As the conductor of the FPC, a pure copper foil or copper alloy foil (hereinafter, simply referred to as "copper foil") that has been subje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22F1/08B21B37/16
Inventor 室贺岳海佐佐木元山本佳纪
Owner SH COPPER PROD CO LTD
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