Fileformat OASIS

Introduction
Screenshots
License
Download
Userinterface
Function Index
White Papers
Community
Contact

no help

OASIS (Open Artwork System Interchange Standard)

Open Artwork System Interchange Standard (OASIS (TM)) is a specification for hierarchical integrated circuit mask layout data format for interchange between EDA software, IC mask writing tools and mask inspection tools.
The name is the trademark of SEMI. It is developed by SEMI for microelectronics/fabrication industry as a replacement for GDSII format, the IC industry de facto standard for IC layout data exchange for more than two decades.
Like GDSII, OASIS (TM) is a hardware- and software-independent binary data format.
It delivers the improvements of a smaller file size over GDSII file format. The smaller file size may result in a faster loading of files, but due to its internal structure a higher computation power is needed which may lead to longer loading and saving times. The OASIS file format is not as common as the GDSII file format.

Handling of Layers in OASIS

The OASIS saves a layer number to each element like polygon, path, etc. By default the LayoutEditor keeps these number untouched. Optional it is possible to setup a layer mapping. With this mapping a combination of layer/datatype in the OASIS file can be maped to a layernumber in the LayoutEditor. The setup can be done via the setup dialog or via a macro. Optional the OASIS file format has the ability to save the layernames. If the layernames are present, a adjustment in the LayoutEditor will take place.

using Ctrapezoids/Trapezoids

By default all non boxes are saved as polygon. If the polygon has a shape of a ctrapezoids or trapezoids there can by stored in the OASIS file with a less size. But a additional computing tie is need during the save function.

OASIS: save regular polygon as circles

The OASIS file format allows to handle circles. Circles are not supported by the LayoutEditor as basic elements, there are stored as regular polygons. By activating this option any regular polygon with more than 8 points will be saved as a circle element and not as a polygon.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -