GDSII stream format (GDSII), is a binary databasefile format which is the de facto industry standard for Electronic Design Automation data exchange of integrated circuit or IC layout artwork.[1] It is a binary file format representing planar geometric shapes, text labels, and other information about the layout in hierarchical form. The data can be used to reconstruct all or part of the artwork to be used in sharing layouts, transferring artwork between different tools, or creating photomasks.
A rendering of a small GDSII standard cell with three metal layers (dielectric has been removed). The sand-colored structures are metal interconnect, with the vertical pillars being contacts, typically plugs of tungsten. The reddish structures are polysilicon gates, and the solid at the bottom is the crystalline silicon bulk.
Initially, GDSII was designed as a stream format used to control integrated circuit photomask plotting. Despite its limited set of features and low data density, it became the industry conventional stream format for transfer of IC layout data between design tools of different vendors, all of which operated with proprietary data formats.
It was originally developed by Calma for its layout design system, "Graphic Design System" ("GDS") and "GDSII".
GDSII files are usually the final output product of the IC design cycle and are handed over to IC foundries for IC fabrication. GDSII files were originally written on magnetic tape.
Objects contained in a GDSII file are grouped by assigning numeric attributes to them including a "layer number", "datatype" or "texttype". While these attributes were designed to correspond to the "layers of material" used in manufacturing an integrated circuit, their meaning rapidly became more abstract to reflect the way that the physical layout is designed.
As of April 2008, many EDA software vendors have moved to the stream format OASIS, which replaced GDSII.[2]
GDSII utilities
As the GDSII stream format is a de facto standard, it is supported by nearly all EDA software. Besides the commercial vendors there are plenty of free GDSII utilities. These free tools include editors,[3][4][5] viewers,[6] utilities to convert the 2D layout data into common 3D formats,[7][8] utilities to convert the binary format to a human readable ASCII format[9] and program libraries.[10][11][12]
^"nanoViewer" is a free GDSII viewer, . Archived from the original on 2012-01-19. Retrieved 2017-10-09.{{cite web}}: CS1 maint: archived copy as title (link) CS1 maint: bot: original URL status unknown (link)
^With GdsViewer tool, any portion of GDSII artwork can be exported to 3D VTK file. The latter can be viewed and manipulated with VTK compatible viewers, e.g. ParaViewhttp://www.gbresearch.com/gdsviewer
Computer Aids for VLSI Design - Appendix C: GDS II Format by Steven M. Rubin // Addison-Wesley, 1987
The GDSII Stream Format by Jim R. Buchanan, 6/11/96
GDS II Graphic Design System User's Operating Manual, First Edition 1978 // Calma Interactive Graphic Systems, November 1978. Retrieved Apr 21, 2020.
GDSII™ Stream Format Manual (B97E060), Release 6.0 // Calma, February 1987
SPIE Handbook of Microlithography, Micromachining and Microfabrication, Vol. 1: Microlithography // Bellingham, Wash. : SPIE Optical Engineering Pr., 1997, 2.9 Appendix: GDSII Stream Format
Details of GDSII format including illustrations
August 24, 2023
gdsii, stream, format, binary, database, file, format, which, facto, industry, standard, electronic, design, automation, data, exchange, integrated, circuit, layout, artwork, binary, file, format, representing, planar, geometric, shapes, text, labels, other, i. GDSII stream format GDSII is a binary database file format which is the de facto industry standard for Electronic Design Automation data exchange of integrated circuit or IC layout artwork 1 It is a binary file format representing planar geometric shapes text labels and other information about the layout in hierarchical form The data can be used to reconstruct all or part of the artwork to be used in sharing layouts transferring artwork between different tools or creating photomasks GDSIIFilename extension gdsDeveloped byCalmaInitial release1989 34 years ago 1989 Type of formatbinary 1 Free format noA rendering of a small GDSII standard cell with three metal layers dielectric has been removed The sand colored structures are metal interconnect with the vertical pillars being contacts typically plugs of tungsten The reddish structures are polysilicon gates and the solid at the bottom is the crystalline silicon bulk Contents 1 History 2 GDSII utilities 3 See also 4 Notes 5 References 6 External linksHistory EditGDS Graphic Design System see GDS78 Initially GDSII was designed as a stream format used to control integrated circuit photomask plotting Despite its limited set of features and low data density it became the industry conventional stream format for transfer of IC layout data between design tools of different vendors all of which operated with proprietary data formats It was originally developed by Calma for its layout design system Graphic Design System GDS and GDSII GDSII files are usually the final output product of the IC design cycle and are handed over to IC foundries for IC fabrication GDSII files were originally written on magnetic tape Objects contained in a GDSII file are grouped by assigning numeric attributes to them including a layer number datatype or texttype While these attributes were designed to correspond to the layers of material used in manufacturing an integrated circuit their meaning rapidly became more abstract to reflect the way that the physical layout is designed As of April 2008 many EDA software vendors have moved to the stream format OASIS which replaced GDSII 2 GDSII utilities EditAs the GDSII stream format is a de facto standard it is supported by nearly all EDA software Besides the commercial vendors there are plenty of free GDSII utilities These free tools include editors 3 4 5 viewers 6 utilities to convert the 2D layout data into common 3D formats 7 8 utilities to convert the binary format to a human readable ASCII format 9 and program libraries 10 11 12 See also EditCaltech Intermediate Form OASIS Open Artwork System Interchange Standard EDIF a vendor neutral file format made in 90s Crystallographic Information FileNotes Edit a b All About Calma s GDSII Stream File Format www artwork com Retrieved 2022 05 26 Going from GDSII to OASIS Philippe Morey Chaisemartin Xyalis EETimes 8 4 2008 LayoutEditor a free GDSII editor http www layouteditor net KLayout is a free GDSII LEF DEF OASIS Gerber DXF CIF editor with DRC http www klayout de Glade a free GDSII LEF DEF editor http www peardrop co uk glade Archived 2013 03 27 at the Wayback Machine nanoViewer is a free GDSII viewer Archived copy Archived from the original on 2012 01 19 Retrieved 2017 10 09 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link CS1 maint bot original URL status unknown link gds2pov easily convert GDSII data into a nicely rendered 3D view http www atchoo org gds2pov With GdsViewer tool any portion of GDSII artwork can be exported to 3D VTK file The latter can be viewed and manipulated with VTK compatible viewers e g ParaView http www gbresearch com gdsviewer GDS Utilities can convert binary GDSII files to ASCII representation http www gbresearch com gdsutilities Ruby GDSII Library for reading manipulating and writing GDSII data in the Ruby programming language http www rubyforge org projects gdsii Python GDSII Library for creating and manipulating GDSII files with Python http gdspy sourceforge net index html Octave and MATLAB toolbox for reading and writing GDSII layout files https sites google com site ulfgri numerical gdsii toolboxReferences Edit Clein Dan 2000 CMOS IC Layout Newnes ISBN 0 7506 7194 7 GDS78 Calma 1978 GDS II Graphic Design System User s Operating Manual First Edition 1978 Online at http www bitsavers org pdf calma GDS II Users Operating Manual Nov78 pdf Retrieved Apr 21 2020 External links EditComputer Aids for VLSI Design Appendix C GDS II Format by Steven M Rubin Addison Wesley 1987 The GDSII Stream Format by Jim R Buchanan 6 11 96 GDS II Graphic Design System User s Operating Manual First Edition 1978 Calma Interactive Graphic Systems November 1978 Retrieved Apr 21 2020 GDSII Stream Format Manual B97E060 Release 6 0 Calma February 1987 SPIE Handbook of Microlithography Micromachining and Microfabrication Vol 1 Microlithography Bellingham Wash SPIE Optical Engineering Pr 1997 2 9 Appendix GDSII Stream Format Details of GDSII format including illustrations Retrieved from https en wikipedia org w index php title GDSII amp oldid 1125342209, wikipedia, wiki, book, books, library,
