Abstract: A method includes forming a material layer over a substrate, forming a first hard mask (HM) layer over the material layer, forming a first trench, along a first direction, in the first HM layer. The method also includes forming first spacers along sidewalls of the first trench, forming a second trench in the first HM layer parallel to the first trench, by using the first spacers to guard the first trench. The method also includes etching the material layer through the first trench and the second trench, removing the first HM layer and the first spacers, forming a second HM layer over the material layer, forming a third trench in the second HM layer. The third trench extends along a second direction that is perpendicular to the first direction and overlaps with the first trench. The method also includes etching the material layer through the third trench.

Abstract: A method for outputting multiple multimedia tracks along multiple processing paths from a portable electronic device is provided. The method has the steps of: running at least two applications on the portable electronic device; accessing at least two multimedia tracks corresponding to the at least two applications; processing the at least two multimedia tracks along at least two processing paths; transferring the at least two multimedia tracks to at least two output terminals; and playing the at least two multimedia tracks by the at least two output terminals; wherein at least one of the at least two output terminals is external to the portable electronic device.

Abstract: The invention discloses a volume adjusting system and a volume adjusting method. The volume adjusting system includes a volume receiving module, a volume auto-adjusting module, and a volume output module. The volume receiving module is configured for receiving an external sound from an external sound source. The volume auto-adjusting module is connected to the volume receiving module and configured for analyzing the external sound from the volume receiving module and an action of a user of the electronic device, to determine an analysis value corresponding the external sound and the action of the user, automatically adjusting an output volume according to the analysis value, and storing a plurality of volume values corresponding to different analysis values of external sound and user actions. The volume output module is connected to the volume auto-adjusting module, and configured for outputting sound according to the output volume.

Abstract: The invention discloses a volume adjusting system and a volume adjusting method. The volume adjusting system includes a volume receiving module, a volume auto-adjusting module, and a volume output module. The volume receiving module is configured for receiving an external sound from an external sound source. The volume auto-adjusting module is connected to the volume receiving module and configured for analyzing the external sound from the volume receiving module and an action of a user of the electronic device, to determine an analysis value corresponding the external sound and the action of the user, automatically adjusting an output volume according to the analysis value, and storing a plurality of volume values corresponding to different analysis values of external sound and user actions. The volume output module is connected to the volume auto-adjusting module, and configured for outputting sound according to the output volume.