The invention relates to a microporous membrane which comprises polyethylene, the microporous membrane having a differential pore volume curve with an area under the curve over the range of pore diameters of from about 100 nm to about 1,000 nm that is 25% or more of a total area under the curve over the range of pore diameters of from about 10 nm to about 1,000 nm. The security application analyzes the conditions and sets a lock that enables the application to perform only certain types of actions that would be considered secure by the security application. A table is slidably placed on a first surface of the cabinet. Since carriers may easily recombine at the grain boundaries of polysilicon, eddy current generated on a surface of the high resistivity silicon base is reduced, loss of the RF signal is reduced, and linearity of the RF signal device is improved.