A method of manufacturing a TFT array panel according to the present invention forms a gate wire on an insulating substrate. The present invention also relates to a black ink composition afforded from the aforementioned black dye composition. With an electron-beam device having a detector system according to the present invention, it is possible to make a selection in a simple manner, in particular according to backscattered and secondary electrons. The locking member has at least one locking flange extending through aligned apertures in the proximate walls.