A method for the production of 1,1,1,3,3-pentafluoropropene, and particularly to a method characterized by high conversion, yield and selectivity by contacting 2,2-dichloro-1,1,1,3,3,3-hexafluoropropane with hydrogen in the presence of a metal-containing catalyst. As a result, a structure is obtained in which a crystalline insulation layer is formed on a crystalline silicon layer through an amorphous insulation film which is formed by a silicon compound which has an excellent insulation characteristic. Accordingly, contact resistance between the oxide semiconductor layer and each of the source electrode layer and the drain electrode layer can be reduced; thus, a thin film transistor having favorable electric characteristics and a highly reliable display device using the thin film transistor can be provided. The injection filter permits transporting of charge carriers of one polarity type from the first conductive region, through the filter, and through the second conductive region to the third conductive region while blocking the transport of charge carriers of an opposite polarity from the second conductive region to the first conductive region. Different cartridges can be easily interchanged in the bio-separation system to suit the particular sample based separation. An identification of a virtual private network may be carried within a request packet, encapsulating a particular packet, sent by a service node to an application node for applying a service to the particular packet; with the corresponding response packet sent to the service node including an identification of the VPN for use by the service node in forwarding the services-applied packet.