High Frequency Board High Frequency PCB, PCB Process, HDI PCB Board, High Frequency Board, OEM PCB Supplier, Manufacturer Product Type: High Frequency Board Application Field: Communication/Military Layer/Board thickness: 5L/1.9mm Surface finish: ENIG Trace/ Space: 9.0/9.2mil Smallest Hole Diameter: 0.3mm Technical Feature: Three Times Step Slot As an OEM PCB manufacturer, PCBMAIN can produce high frequency PCB, PCB process, HDI PCB board, high frequency board, OEM PCB, wholesale PCB board, single-side PCB, double-side PCB.