Patent ID: 7746657
Filing Date: 2010-06-29
Classification: H05K

Abstract:
1. A device for interconnecting a Small Form Factor Interface (XFI) between a 10 Gbps Physical Layer (PHY) and a Small Form Factor Pluggable (XFP) transceiver comprising: (a) a first layer having a plurality of XFP connector pads surrounded by and operatively connected to a first plurality of ground vias, a first PHY signal pad and a second PHY signal pad and a plurality of PHY ground pads having a second plurality of ground vias, and an XFP cage ground shield with an opening; (b) a second layer located beneath the first layer having a differential pair with a first trace and a second trace and a first guard trace and a second guard trace surrounding the differential pair; (c) a third layer located beneath the second layer having an XFP opening beneath the plurality of XFP connector pads and a first XFP cage ground shield opening and a second XFP cage ground shield opening beneath the XFP cage ground shield; (d) a fourth layer located beneath the third layer serving as ground; and (e) a plurality of blind vias extending between the first layer and the second layer and operatively connected to the differential pair and the plurality of XFP connector pads and the first PHY signal pad and the second PHY signal pad.