SOLID ELECTROLYTE TANTALUM FOIL CAPACITOR.
Abstract
Experimental work has shown that under certain conditions permanent damage to the anodic oxide can be made during the process of depositing the manganese oxide. From the viewpoint of the solid foil tantalum capacitor, the results suggest that a minimum number of deposition cycles must be used with careful control of the solution concentration. The breakdown voltage tests confirm that the type of tantalum foil, in particular, the surface condition, has a controlling effect on subsequent high voltage performance. The formation conditions, formation voltage, number of coats of manganese dioxide, area of deposit and time at decomposition temperature are also very important in controlling the breakdown voltage. For the 250 volt solid foil capacitor application, it is somewhat disturbing to note that the behavior of the Ta2O5/MnOx interface appears to change for thickness greater than the equivalent of 200 volts formation. More work is necessary to determine whether the poorer performance at the higher voltages is due to some basic physical phenomena or due to unsuitable tantalum foil and processing conditions which are not the optimum. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1963
- Accession Number
- AD0423325
Entities
People
- A. L. Jenny
Organizations
- General Electric