A method and device of compressing a digital image are provided. The method includes: receiving a data block that is to be written in an EDRAM; obtaining, according to a status of a bank in the EDRAM, usable addresses corresponding to usable banks in the EDRAM; selecting an address from the usable addresses as a write-in address of the data block; and writing the data block in a bank corresponding to the write-in address. The barrier layer has low resistivity and improved electromigration performance. A hinged lid pivotable about an axis is assigned to the chamber-like intake opening, and the upper device part sits on a lower device part. The drain region is provided in the surface of the drift region and opposed to the source region across the base region and the insulating layer. The laces may comprise 100% liquid crystal polymer, or may comprise between about 30% to 99% liquid crystal polymer fibers and a portion of other fibers.