Abstract: An electronic device, a foldable-slider device, and a method for displaying information are disclosed. The electronic device may include a housing assembly (10) and a display screen (20). The housing assembly (10) may include a first housing portion (11), a second housing portion (12), and a foldable portion (13). The display screen (20) may have a shortcut display area (211). In a condition of the foldable portion (13) being in a folded state, the second housing portion (12) can be enabled to slide between a first folded position where the shortcut display area (211) is covered by the second housing portion (12) and a second folded position where the shortcut display area (211) is exposed from the second housing portion (12).

Abstract: In a photolithographic process using a photolithographic mask having opaque mask areas and transparent mask areas, the opaque mask areas corresponding to a pattern to be transferred onto a semiconductor wafer to form on the wafer a pattern of active structures, a method for improving the performance of the photolithographic equipment and for increasing the lifetime of the optics including providing auxiliary opaque mask areas in areas of the mask not covered by active opaque mask areas, so as to reduce a transmission factor of the mask.