Abstract: In some embodiments, the present disclosure relates to a wafer edge trimming apparatus that includes a processing chamber defined by chamber housing. Within the processing chamber is a wafer chuck configured to hold onto a wafer structure. Further, a blade is arranged near an edge of the wafer chuck and configured to remove an edge potion of the wafer structure and to define a new sidewall of the wafer structure. A laser sensor apparatus is configured to direct a laser beam directed toward a top surface of the wafer chuck. The laser sensor apparatus is configured to measure a parameter of an analysis area of the wafer structure. Control circuitry is to the laser sensor apparatus and the blade. The control circuitry is configured to start a damage prevention process when the parameter deviates from a predetermined threshold value by at least a predetermined shift value.

Abstract: A speaker includes a frame and a partition wall. The frame has ribs to define a central through hole and plural side through holes. The partition wall is coupled with the frame to form a boundary between a high-pitched sound zone and a low-pitched sound zone, wherein a total sum area of the side through holes covered by the partition wall is smaller than a total sum area of the side through holes uncovered by the partition wall.

Abstract: A speaker includes a frame and a partition wall. The frame has ribs to define a central through hole and plural side through holes. The partition wall is coupled with the frame to form a boundary between a high-pitched sound zone and a low-pitched sound zone, wherein a total sum area of the side through holes covered by the partition wall is smaller than a total sum area of the side through holes uncovered by the partition wall.

Abstract: This invention provides an electronic device capable of being connected with an external device. The electronic device includes a first connecting port, an adapting element, and a casing. The first connecting port is disposed at the casing. The adapting element has a second connecting port and a connector. The size of the second connecting port is greater than that of the first connecting port. The casing has a containing space for containing the adapting element. When the electronic device is connected with the external device, the adapting element is separated from the containing space, the connector is connected with the first connecting port, and the second connecting port is connected with the external device.

Abstract: This invention provides an electronic device capable of being connected with an external device. The electronic device includes a first connecting port, an adapting element, and a casing. The first connecting port is disposed at the casing. The adapting element has a second connecting port and a connector. The size of the second connecting port is greater than that of the first connecting port. The casing has a containing space for containing the adapting element. When the electronic device is connected with the external device, the adapting element is separated from the containing space, the connector is connected with the first connecting port, and the second connecting port is connected with the external device.

Abstract: A key with efficiency of depth and scattered light has a key body and a light-shading layer. The key body has a key surface and a key back surface opposite to the key surface, and a pattern is formed on the key surface. The light-shading layer is partially light transmissible and covers over the key back surface. The light-shading layer has a first transparent pattern area, which is located corresponding to the patter. The area of first transparent pattern area is greater than or equal to that of the pattern.