Abstract: The present disclosure provides a semiconductor structure. The semiconductor structure includes a semiconductor substrate, a contact structure, a first conductive element, and a first dielectric spacer structure. The semiconductor substrate includes an active region and an isolation structure. The contact structure is on the active region of the semiconductor substrate. The first conductive element is on the isolation structure of the semiconductor substrate. The first dielectric spacer structure is between the contact structure and the first to conductive element. The first dielectric spacer structure has a first concave surface facing the first conductive element.

Abstract: A vortex insect trap includes an insect trapping container, a fan and an insect-killing device. The insect trapping container internally defines an air flowing space, in which the insect-killing device is disposed. The air flowing space is enclosed in at least one flow-guiding wall surface and communicable with external environment via an air suck-in port and an air exit port of the vortex insect trap. The fan is mounted to the air exit port for sucking in external air via the air suck-in port and discharging air inside the air flowing space from the insect trapping container via the air exit port. When the fan operates, air sucked into the air flowing space flows along the flow-guiding wall surface to form a spiral air flow that flows toward a bottom of the air flowing space while carries insects sucked into the air flowing space to the insect-killing device.

Abstract: A fan grill for a mosquito trap is a board and has a center, a funnel-shaped shell, multiple air holes and a through hole. The shell is formed downward in the center and is tapered off to a bottom. The air holes are respectively formed through the shell and are arranged radially and spirally. The through hole is formed on the bottom of the shell. The radial and spiral air holes are designed according to direction of airflow created by a fan so allow the airflow to pass smoothly therethrough and to generate steady suction forces. Besides, hole diameters of the air holes are less than sizes of mosquitoes so trapped mosquitoes are prevented from escaping from between fan blades of the fan. Therefore, trapping efficiency is enhanced.