Disclosed is a method for forming a low-k dielectric layer of a semiconductor device. Each tunnel endpoint is divided into two sub-endpoints, where one sub-endpoint has a public network address and the other sub-endpoint has a private network address. By transferring data over the secondary channel, the cost to any one terminal to receive the data stream is reduced. The barcode reader can comprise a lighting module that comprises set of lighting elements that emit light. The electrically conductive material 214 has a melting point in a range of about seventy-two degrees Celsius to about ninety-five degrees Celsius.