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| name = OASIS
| developer = [[SEMI]]
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'''Open Artwork System Interchange Standard''' ('''OASIS'''<ref>The trade name [http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78169188 OASIS is a registered trademark in the USA] of Thomas J. Grebinski, Alamo, California and licensed for use exclusively by [http://www.semi.org/ SEMI].</ref>) is a binary file format used for specification of data structures for [[photomask]] production.<ref>{{Cite web |title=SEMI P39 : 2016 SPECIFICATION FOR OASIS - OPEN ARTWORK SYSTEM INT |url=https://infostore.saiglobal.com/en-us/Standards/SEMI-P39-2016-1036702_SAIG_SEMI_SEMI_2419502/ |access-date=2023-05-23 |website=infostore.saiglobal.com}}</ref> It's used to represent a pattern an interchange and encapsulation format for hierarchical integrated circuit mask layout information produced during [[integrated circuit design]] that is further used for [[Semiconductor device fabrication|manufacturing]] of a [[photomask]]. The standard is developed by [[SEMI]].<ref name=":0">{{cite web |title=OASIS |url=https://www.layouteditor.org/layout/file-formats/oasis#:~:text=Open%20Artwork%20System%20Interchange%20Standard%20(OASIS)%20is%20a%20specification%20for,is%20the%20trademark%20of%20SEMI. |access-date=2022-05-26 |website=www.layouteditor.org}}</ref><ref name=":1">{{cite web |title=About OASIS SEMI P39 |url=http://www.yottadatasciences.com/compliancecenter.html |access-date=2022-05-26 |website=www.yottadatasciences.com}}</ref> The language defines the code required for geometric shapes such as rectangles, trapezoids, and polygons. It defines the type of properties each can have, how they can be organized into cells containing patterns made by these shapes and defines how each can be placed relative to each other. It is similar to [[GDSII]].
As of 2023 the cost of the standard for members of [[SEMI]] was set to $252 and non-members: US$335
==Introduction==
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OASIS is the purported commercial successor to the integrated circuit design and manufacturing electronic pattern layout language, [[GDSII]].
GDSII was created in the 1970s when integrated circuit designs had a few hundred thousand geometric shapes, properties and placements to manage. Today, there can be billions of shapes, properties, and placements to manage. File sizes of GDSII format often takes tens of gigabytes of storage and are difficult to store and process.<ref>{{Cite web |title=OASIS Format |url=http://www.wrcad.com/manual/xicmanual/node775.html |access-date=2023-05-23 |website=www.wrcad.com}}</ref> OASIS creators and users claimed that the growth of workstations' data storage and handling capabilities was far outpaced by the growth of Integrated Circuit layout complexity.<ref>{{cite web|url=http://www.eetimes.com/document.asp?doc_id=1276148 |title=Going from GDSII to OASIS |publisher=EETimes |date=2022-08-30 |accessdate=2022-09-11}}</ref> Therefore, OASIS tries to solve the purported problem of the large size of the [[GDSII]] files by introducing complicated types of the geometric shapes (25 types of trapezoids only) to reduce the data size. Also, variable-length numeric format (similar to [[Run-length encoding]]) for coordinates was implemented. Finally, each cell in the OASIS file can be independently compressed by the [[gzip]]-like algorithm.
The effort to create the OASIS format started in June 2001. The release of version 1.0 took place in March 2004. Its use required the development of new OASIS readers and writers that could be coupled to design and manufacturing equipment already equipped with GDSII readers and writers. Its adoption was born of a concerted effort by integrated circuit design, equipment, photomask, fabless, 3rd party Intellectual Property (IP) and manufacturing companies from the United States, Japan, Taiwan, Korea and Europe.
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