| 초록 |
Dry film resist (DFR) is photosensitive film which is usually used for printed circuit board fabrication. DFR is made up of a binder polymer and photocuring monomers. It is cross-linked by exposure to UV light. Stripper is a chemical solution that removes the residual DFR after the plating processes. Most of the conventional strippers are composed of tetramethylammonium hydroxide (TMAH). However, TMAH which is a key component of the conventional strippers is a toxic material to the human body. We have suggested a novel formulation stripper to replace the TMAH component. Novel stripper is based on organic hydroxides, amines and organic additives. It is less harmful than the conventional strippers while improving strip performance. Furthermore, we proposed the strip mechanism with the component analysis of DFR. |
