Abstract: An integrated circuit (IC) structure includes a substrate having several regions, several semiconductor devices formed at the substrate and respectively within the regions, and an ultra-deep (UD) trench isolation structure formed in the substrate. The substrate has a top surface and a bottom surface oppositely, and the UD trench isolation structure formed in the substrate surrounds peripheries of each of the regions for structurally and physically isolating the semiconductor devices within different regions. The UD trench isolation structure penetrates the substrate by extending from the top surface of the substrate to the bottom surface of the substrate.

Abstract: A quick-fit self-priming drain pipe, comprises at least two pipes and at least a joint pipe for connecting several pipes. The surface of the pipe is surrounded with several endlong extended slots in the axial direction of the pipe. From the end face of the pipe, the slot comprises a trench hole and a slot opening from inside to outside. The outer surface at the end of the pipe is surrounded with several locating holes. The joint pipe has at least two through holes corresponding to one end of pipe, and its inner surface is surrounded with several locating pieces corresponding to the locating holes. Hereby, the construction operation is simplified, and the working efficiency and draining efficiency are increased greatly.

Abstract: Disclosed is a gas-induced reactor which mainly includes a tank body without inner baffles and a draft tube with inner baffles mounted in the tank body. An upper and a lower turbines are installed in series on a shaft of said tank body and enclosed by the draft tube. The turbines each have six 45.degree. pitched, rectangular, flat blades. When the two turbines rotate at high speed to agitate gas and liquid in the draft tube, a downward regular gas vortex is formed at a center of liquid surface in the tank body above the draft tube. The regular gas vortex is pulled inward to the draft tube and is disturbed by the baffles in the draft tube to become an irregular gas vortex in the draft tube. The irregular gas vortex is broken by the rotating turbines into bubbles which are angularly distributed out of the draft tube and into liquid in the tank body.