Hardened Fe-Ni alloy for the manufacture of integrated circuit leaderframes and manufacturing process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 17, 2004
Grant Date -
N/A
app pub date -
Nov 26, 2002
filing date -
May 30, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of making a Fe-Ni strip whose chemical composition comprises, by weight: 36% .ltoreq.Ni+Co.ltoreq.43%; 0%.ltoreq.Co.ltoreq.3%; 0.05%.ltoreq.C.ltoreq.0.4%; 0.2%.ltoreq.Cr.ltoreq.1.5%; 0.4%.ltoreq.Mo.ltoreq.3%; Cu.ltoreq.3%; Si.ltoreq.0.3%, Mn.ltoreq.0.3%; the rest being iron and impurities, the alloy having an elastic limit Rp0.2 more than 750 Mpa and a distributed elongation Ar more than 5%. The alloy is optionally recast under slag. The strip is obtained by hot-rolling above 950.degree. C., then cold-rolling and carrying out a hardening treatment between 450.degree. C. and 850.degree. C., the hardening heat treatment being preceded by a reduction of at least 40%. The invention is useful for making integrated circuit support grids and electronic gun grids.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully