{"properties": {"OPERATOR": "B.Masic"}, "BOTTOM_LAYER_THICKNESS": -1, "COVERLAY_WITH_ADHESIVE_THICKNESS": -1, "DIELECTRIC_THICKNESS": -1, "INNER_LAYER_THICKNESS": -1, "SOLDERMASK_THICKNESS": -1, "THICKNESS": -1, "TOP_LAYER_THICKNESS": -1}