High-strength thin plate of iron-nickel-cobalt alloy excellent in corrosion resisitance, repeated bending behavior and etchability, and production thereof
US5792286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1995 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Mar 20, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength thin plate, such as for IC lead frames, of an iron-nickel-cobalt alloy which is able to withstand repeated bending and is corrosion resistance and etchable, the alloy containing 27 to 30 wt. % N:, 5 to 18 wt. % Co, 0.10 to 3.0 wt. % Mn, 0.10 wt. % or less Si, 0.010 to 0.075 wt. % C, 0.001 to 0.014 wt. % N, less than 2.0 ppm H, 0.0040 wt. % or less S, 0.004 wt. % or less P, 0.0050 wt. % or less O, 0.01 to 0.06 wt. % Cr, 0.01 to 1.0 wt. % Mo and the balance being Fe and unavoidable impurities wherein 63.5 wt. %.ltoreq.2Ni+Co+Mn.ltoreq.65 wt. % for Co<10 wt. % and 69.5 wt. %.ltoreq.2Ni+Co+Mn.ltoreq.74.5 wt. % for Co>10 wt. %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.