Abstract: A processing apparatus for overlay shift includes a storage unit and a control unit, and is applicable to a semiconductor wafer with several inspection regions. Each of the inspection regions has several sets of overlay marks for inspection. One set of overlay marks includes an original alignment mark without any overlay shift, and several split alignment marks with predetermined overlay shifts arranged near the original alignment mark. The original after-etch inspection (AEI) overlay data of the inspection regions is stored in the storage unit. The after-develop inspection (ADI) overlay data of the original alignment mark and the split alignment marks are compared with the original AEI overlay data by the control unit, thereby acquiring ADI pre-bias data of the original alignment mark and the split alignment marks. The control unit determines whether an overlay shift compensation is performed according to the acquired ADI pre-bias data.

Abstract: A data storage device including a flash memory and a controller. The flash memory includes a plurality of blocks, and each of the blocks has a plurality of pages. The controller receives a write command which is arranged to write a plurality of data sectors into a plurality of first pages of a first block of the blocks, calculates an offset index according to a first erase count of the first block, retrieving a plurality of seeds from a random seed table according to the offset index, encodes the data sectors by using the retrieved seeds to obtain a plurality of encoded data sectors, and writes the encoded data sectors into the first pages.

Abstract: A data storage device including a flash memory and a controller. The flash memory includes a plurality of blocks, and each of the blocks has a plurality of pages. The controller receives a write command which is arranged to write a plurality of data sectors into a plurality of first pages of a first block of the blocks, calculates an offset index according to a first erase count of the first block, retrieving a plurality of seeds from a random seed table according to the offset index, encodes the data sectors by using the retrieved seeds to obtain a plurality of encoded data sectors, and writes the encoded data sectors into the first pages.