::::HANTECH PRODUCTS:::: =========================== ▒ Metal Dome ===========================  R-Series  RDP-Series  RCC-Series  DR-Series  DRDP-Series  DRCC-Series  4L-Series  RL-Series  SMD-Series =========================== ▒ Metal Dome Sheet Ass'y ===========================  NAVI Key  Main Key   - Sheet Type   - Reel Type   - Normal Type   - EMI Type   - Dome Sheet-PCB Ass'y  Side Key =========================== ▒ Flexible PCB ===========================  Flexible PCB   - Single-sided circuits   - Double-sided   - Multi-layer  Rigid-flex Circuit Board  Rigid PCB ........................................ HOME > R&D > Metal Dome > Metal Dome Sheet Design Guide             Based on the top-class automated facilities and process capability, Hantech will provide the best solution for your keypad design.     - Dome Hole To Dome Hole Space : min 0.800mm - Dome Hole To LED/Guide Hole Space : min 0.500mm - Dome Hole To Dome Sheet Edge : min 0.500mm - LED/Guide Hole To Dome Sheet Edge : min 0.200mm - Guide Pin Hole Diameter : min 1.0mm     - Center Line To Dome Hole (A) : ± 0.030mm - Center Line To LED Hole (B) : ± 0.050mm - Center Line To Outer Line (C) : ± 0.050mm - Metal Dome Center To Hole Center (D) : ± 0.150mm     Generally the non-printing area from the outer line is given 0.700mm.