Title:
SURFACE TREATED STEEL SHEET FOR LEAD FRAME HAVING SUPERIOR CORROSION RESISTANCE, SOLDERABILITY AND ADHESION
Document Type and Number:
Japanese Patent JPS63109189
Kind Code:
A
Abstract:
PURPOSE:To improve the corrosion resistance, solderability and adhesion of a Cr steel sheet contg. specified amts. of C, acid-sol. Al, Cr, Ti, Nb, Zr and V by forming a Cu coating layer of a prescribed thickness on the steel sheet. CONSTITUTION:This surface treated steel sheet for a lead frame is obtd. by forming a Cu coating layer of 1.5-10mum thickness on a Cr-contg. steel sheet consisting of, by weight, <=0.06% C, 0.005-0.1% acid-sol. Al, 3-11% Cr, 0.03-0.8% one or more among Ti, Nb, Zr and V and the balance Fe. The surface treated steel sheet has superior corrosion resistance, solderability and adhesion.
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Inventors:
HIGUCHI YUKINOBU
KATAYAMA TOSHINORI
TSUZUKI NOBUO
YAMAMOTO FUMIO
ASAKAWA KENICHI
KATAYAMA TOSHINORI
TSUZUKI NOBUO
YAMAMOTO FUMIO
ASAKAWA KENICHI
Application Number:
JP25526386A
Publication Date:
May 13, 1988
Filing Date:
October 27, 1986
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
C25D5/26; C22C38/00; C22C38/28; C22C38/50; (IPC1-7): C22C38/00; C22C38/28; C22C38/50; C25D5/26
Attorney, Agent or Firm:
Teruo Taniyama