A box includes a top panel, a front panel and side panels. This tunneling junction structure will be useful for the fabrication of a highly reliable ultrahigh-speed optoelectronic device. The trench control regions are configured to provide a generally vertical channel region electrically coupling source regions to the sub-surface doped layers. The tank can have at least one drinking bowl access hole which allows access from the tank to the bowl. 5 g10 min, and especially from 1. The RF trap is coupled between the parallel amplifier output and a ground.