Top 10 Considerations for PCB Imposition

  1. The outer frame (clamping edge) of the PCB panel should adopt a closed-loop design to ensure that the PCB panel will not be deformed after being fixed on the fixture;

  2, PCB panel width ≤ 260mm (SIEMENS line) or ≤ 300mm (FUJI line); if automatic dispensing is required, PCB panel width × length ≤ 125mm × 180mm;

  3. The shape of the PCB panel should be as close to a square as possible. It is recommended to use 2×2, 3×3,...

  4. The center distance between the small plates is controlled between 75mm and 145mm;

  5. When setting the reference positioning point, usually leave a non-masking area 1.5mm larger than it around the positioning point;

      6. There should be no large components or protruding components near the connection point between the outer frame of the puzzle and the inner small board, and between the small board and the small board, and there should be a space greater than 0.5mm between the components and the edge of the PCB board. To ensure the normal operation of the cutting tool;

  7. Open four positioning holes at the four corners of the outer frame of the jigsaw, with a diameter of 4mm±0.01mm; the strength of the holes should be moderate to ensure that they will not break during the process of upper and lower plates; the aperture and position accuracy should be high, and the hole walls should be smooth and hairless

  8. Each small board in the PCB puzzle must have at least three positioning holes, 3≤diameter≤6mm, and no wiring or patching is allowed within 1mm of the edge positioning hole;

      9. The reference symbols used for the positioning of the entire PCB and the positioning of the fine-pitch devices. In principle, the QFP with a spacing of less than 0.65mm should be set at its diagonal position; the positioning reference symbols for the imposition PCB daughter board should be paired. Use, arrange at the opposite corner of the positioning element;