抄録
In the electro-deposition process for a magnet production, pin-hole type defectives are frequently produced due to the variation of magnet material used in the process. To reduce the pin-hole problem, a study was conducted to improve the function of electro-deposition. In the study, the cumulated amount of coulomb was used as the input, the deposit thickness was used as the output and their relationship was considered as the generic function. Deterioration of solution was used as a noise factor. Zero-point Proportional equation was used for the analysis. The gain of the optimum condition was estimated as 5.48 db whereas the gain from the confirmation was 4.28 db, indicating a good reproducibility. These results were applied to the mass production process, and the number of pin-hole related defectives was significantly reduced.
