pdaPosition3D

Define a location.

A position is a 6-axis value in 3D, but as chip design needs only x & y and less angles only the x is required. The x, y and z are in micron, while the angles angle, pitch and roll are in degrees.

The x & y locations are for 2D / chip design.
The z coordinate is mostly oriented at Assembly Design Kits (ADK) but if different layer stacks are used on chip (regrowth, etching) it provides for vertical in-chip coupling.
The angle is the rotation in x/y plane and often used in all-angle photonics chip design.
The pitch is the angle off-chip and for chip design mostly for vertical fiber/chip coupling.
The roll is oriented at Assembly Design Kits (ADK) and not needed in chip design kits (PDK).

Structure

This element does not have attributes. The elements are shown below, in a sorted per type fashion.
In case a list is printed after an element, it indicates that you can have many, otherwise it should be a single element. With a optional it tells the element is not required.

<position> ...
  <angle> ... </angle>    optional
  <pitch> ... </pitch>    optional
  <roll> ... </roll>    optional
  <x> ... </x>
  <y> ... </y>    optional
  <z> ... </z>    optional
</position>

XSD

The schema file can be downloaded or viewed at xPDK_Base.

Details

angle

Planar angle (yaw) Type pdaAngle documentation: Define angle, default unit is degree.

pitch

Vertical angle (pitch) Type pdaAngle documentation: Define angle, default unit is degree.

roll

Self rotation angle (roll). Type pdaAngle documentation: Define angle, default unit is degree.

x

X-coordinate if the location is in global space. For relative coordinates the value is 'moving forward'. Type pdaValueDouble documentation: Define some (double) value, unit is micron for position and degrees for angles. The expression is in the content.

y

Y-coordinate if the location is in global space. For relative coordinates the value is 'sideways shift'. Type pdaValueDouble documentation: Define some (double) value, unit is micron for position and degrees for angles. The expression is in the content.

z

Z-coordinate if the location is in global space, this value is normally not used in chip design. For relative coordinates the value is 'moving upwards'. Type pdaValueDouble documentation: Define some (double) value, unit is micron for position and degrees for angles. The expression is in the content.