A Loss Of Signal circuit in an opto-electronic receiver circuit. Clock recovery is employed in the receiver. This combined signal is then passed through a docking connector. After molding, the tube may be filled with metal to improve conduction of heat away from the die top. Specifically provided is a polymer member with a resistance to cigarette burns, including a polymer layer, in which: the polymer layer contains a layered inorganic compound in a polymer ; and the polymer contains a cross-linked polymer. A transmissive disk for use in head levitation measurement in the present invention has a first side of a transmissive plate to which AR coating has been applied and a second side thereof to which lubricant coating has been applied.