Title:
BENDING RESISTING ROLLED COPPER FOIL
Document Type and Number:
Japanese Patent JPH04228553
Kind Code:
A
Abstract:
PURPOSE: To obtain a rolled copper foil excellent in bending fatigue life and reduced in softening temp.
CONSTITUTION: This copper foil is a bending resisting rolled copper foil characterized by having a draft of ≥ at least 90% (further preferably, ≥93%) at the time of subjecting an annealed intermediate stock consisting of tough pitch copper or oxygen-free copper to final cold rolling to the prescribed thickness. Moreover, it is desirable to form a roughed surface (ruggedness) to a height of ≤2μm on the surface of the cold rolled copper foil or further to form an oxide film by means of chemical conversion treatment on this roughed surface.
Inventors:
YAMAMOTO YOSHINORI
SAKAI SHUJI
SEKI KUNIAKI
ABE HAJIME
OTANI NORIO
SAKAI SHUJI
SEKI KUNIAKI
ABE HAJIME
OTANI NORIO
Application Number:
JP12172091A
Publication Date:
August 18, 1992
Filing Date:
May 28, 1991
Export Citation:
Assignee:
HITACHI CABLE
International Classes:
B21B1/40; C22C9/00; C22F1/00; C22F1/08; H01L21/60; H05K1/02; H05K3/38; B21B3/00; H05K1/09; (IPC1-7): B21B1/40; C22C9/00; C22F1/08; H01L21/60; H05K1/02; H05K3/38
Attorney, Agent or Firm:
Shigeru Kawasumi (1 person outside)
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