Profile: Xeco, Inc. designs and manufactures high frequency crystal blanks and inverted mesa plated crystal blanks. We deal with crystal blanks, sensor blanks and finished crystals. Our RM098 series low cost inverted mesa crystals blanks offer plated crystals for 5x7 smd assembly of frequencies ranging from 50 to 750 MHz operation. These will fit into modified clip um-1 and hc45 style packages. The SM141 series of electrode plated square inverted mesa blanks are designed to mount in standard 0.200" mounts.