A method of fabricating a vehicle door includes providing a lower door structure, providing an upper door structure having a pair of spaced apart frame rails, installing a window member between the frame rails, installing a window regulator to the window member and the upper door structure, and coupling the lower and upper door structures to one another. The present invention is particularly applicable to a method of providing secure communication between a first and second decoder. 0 gcm3 and an average grain size of not larger than 25 \u03bcm, is used as the metal powder p. Third wave segments are derived in response to each negative going transition. The invention may also provide a virus remover.