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Special Properties

When converting from GDSII, there are attributes used in GDSII that are not used by Xic. These attributes are saved as properties of the top-level cells, and will be added to any subsequent GDSII file produced with these cells. Also, the wire end style is saved as a property of wires, since the CIF format does not provide a variable for this.
LabelSize Property: Property number 7180
This property is added to labels when writing to GDSII, and saves the label width and height. The string has the format
width width height height
where width and height are in internal units.

Electrical property labels may have either of the keywords ``show'' or ``hide'' appended to the end of the string. This stores the display state of the label, which can be visible or ``hidden'', toggled by clicking with button 1 with the Shift key held.

Text Property: Property number 7012
This property saves GDSII label parameters ANGLE, MAG, WIDTH, and PTYPE, which are unused by Xic. The string consists of a concatenation of keyword/value pairs, using the keywords above (not all need be present). These attributes will be reassigned to the label when a GDSII file is written.

Pathtype Property: Property number 7033
This property is used for physical mode wires of nonzero width which have a nondefault path type. The string has the form
PATHTYPE pathtype
where pathtype is 0 for flush ends, 1 for rounded ends. The default pathtype is 2 (extended ends). This property is not added to wire objects when reading GDSII, but is added to wires in native and CIF output if the CifOutExtensions variable has the wire extension flag set. The wire end style is now included in the wire specification in the present default syntax.


next up previous contents index
Next: Physical Mode Properties Up: Property Specifications Previous: Global Properties   Contents   Index
Stephen R. Whiteley 2012-04-01