| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 05.99 |
| PATENT ASSIGNEE | Phelps Dodge Industries Inc (Phoenix; Ariz) |
| PATENT CLAIMS |
- Exposing Cu surface to acid bath contg SO4H2 (190-250 g/l) said bath at 70-80C - Exposing surface to separate oxidizing bath contg H2O2 (10-30 g/l) at 40-45C - Rinsing surface with high pressure jets of rinsing water the reby removing oxides from surface |
| PATENT PHOTOCOPY | Available on request |
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