Abstract: A semiconductor device is provided. The semiconductor device includes a substrate, a stacked gate structure, and a wall structure. The stacked gate structure is on the substrate and extending along a first direction. The wall structure is on the substrate and laterally aside the stacked gate structure. The wall structure extends along the first direction and a second direction perpendicular to the first direction. The stacked gate structure is overlapped with the wall structure in the first direction and the second direction.

Abstract: A self-checkout method includes an image recognizing system performing a first recognition process on at least a product placed on a checkout conveyor to obtain an item information corresponding to the at least a product from a product database; performing a second recognition process for positioning a first product of the at least a product to determine a position of the first product relative to the checkout conveyor when the image recognizing system fails to recognize the first product based on the first recognition process; controlling an indicating light to markedly label the first product when the position of the first product is determined, and stopping running the checkout conveyor; and resuming running the checkout conveyor after the first product is removed or when no product cannot be recognized by the first recognition process.

Abstract: A self-checkout method includes an image recognizing system performing a first recognition process on at least a product placed on a checkout conveyor to obtain an item information corresponding to the at least a product from a product database; performing a second recognition process for positioning a first product of the at least a product to determine a position of the first product relative to the checkout conveyor when the image recognizing system fails to recognize the first product based on the first recognition process; controlling an indicating light to markedly label the first product when the position of the first product is determined, and stopping running the checkout conveyor; and resuming running the checkout conveyor after the first product is removed or when no product cannot be recognized by the first recognition process.

Abstract: A phone-mediating trading system and a method for use with the same are provided. After the user uses a user phone to construct linkage to the trading host, the trading host generates a set of random data to the user phone where the set of random data is encrypted with a private key designated to the user phone. The encrypted set of random data is transmitted to the trading host, and decrypted through the use of a public key that is stored in the trading host and corresponds to the user's phone number. If the decrypted set of random data, as determined by the trading host, is the same as the originally-generated set of random data, the user is allowed to perform trading with the trading host. This method is efficient and convenient to implement without performing a conventional complex identification process for identifying the user.