the filter as a result of the marking application_number US 38096006 A description according to an embodiment of the invention a workpiece such as an outer shell or sleeve of a cable tv system component which component preferably being a trap or surface mount product is marked with indicia relating to specific characteristics of the system component such as the part number or other information with the indicia preferably being a logo bar coding date coding 2 d matrix or similar the marking is preferably done with a laser and preferably an excimer laser or pulsed solid state laser such as the versascribe gm laser marking system manufactured by alase technologies inc according to alase versascribe gm yag laser engraving systems are designed to bring precision reliability versatility and speed to the most demanding applications with winlase software allowing for applications ranging from deep engraving to fine surface annealing the versascribe yag laser features q switched flash lamp technology for high laser energy densities and proven reliability the laser preferably operates in temoo mode because the internal q switch is software controlled the operator has the flexibility to change the laser beam power characteristics for marking materials such as steel aluminum and soft plastics the versascribe laser is a high performance nd yag laser marker with 80 watts cw at 1064 nm the laser marking is preferably done at 90 power 4 khz with a marking speed of 500 mm sec this setting is used for both the stainless and brass cases the etch depth is no greater than 0 0002 u2033 so that the base material is.