General Design Rules

Standard Design Rules


Accepted File Format:

FlowJEM accepts your custom designs in the form of .dxf, .dwg ,and .gds.

Design File Requirements

If you use another CAD system, be aware that not all are compatible with our graphical systems. By following the general drawing design rules below allows FlowJEM to fulfill your order in the most timely and cost-effective manner possible. Please note that if format changes are necessary to meet FlowJEM’s fabrication requirements, a design fee may be added and an increase in our turnaround time.

  1. Regardless of the type of CAD software you use to create your design, when drawing boundaries, use zero-width closed polylines. Use a close command to ensure that the area is completely closed.
  2. Do not use hatching to identify filled surfaces on the mask.
  3. Set up a grid in your drawing environment and use that grid for snap purposes. The snap function should always be on.
  4. Ensure that the User Coordinate System is set to World and work in units of microns or millimeters.
  5. Locate the data origin 0,0 near the data extents. The origin can be located near the lower left of the data extents, or your data can be centered around the origin, but do not located data far away from the origin.
  6. Boundaries must contain at least 3 vertices and have no more than 200. Do not allow boundaries to overlap or self-intersect. A boundary may touch itself and if it does, is known as a re-entrant boundary.
  7. Before creating the .dxf file, purge the drawing of all unused layers, objects, and text.
  8. Ensure that either millimeter or micron is used.
  9. All features should be placed in a 3.5 inch circle for a 4 inch wafer or 4.5 inch circle for a 6 inch wafer.