Layout Software

WieWeb software's main product is the layout editor CleWin. CleWin is a layout editor we designed in cooperation with the MESA+ Research Institute at the University of Twente and Deltamask, a mask making company. Since we started with the development of CleWin, more than 15 years ago, the product has evolved from a simple editor to a powerful mask design tool. The product has been very successful over the years and is used worldwide in 33 countries at hundreds of companies and universities.

CleWin runs on a PC with Windows 7 or higher. It is compatible with other layout packages since it uses the standard CIF and GDS-II file formats. Furthermore, CleWin can read and write the AutoCAD DXF format. High resolution (Encapsulated) PostScript is available as output format. Bitmap files can be easily imported using the separate bitmap import utility.

Because CleWin is also meant to be used by students a lot of attention is given to the user interface. CleWin is a hierarchical layout editor, i.e. a layout consists of symbols (also called cells) which may be nested. Editing a symbol in one place will change all other instances of the same symbol. CleWin shows a hierarchical list of all symbols in a design, so that each symbol definition is directly accessible for editing. Furthermore, the hierarchical list provides a clear overview of the file structure and the dependencies between the defined symbols. In version 4, a powerful scripting engine was added, that allows the generation of objects using four different languages: C, Matlab, the MaskEngineer language and Lua. Scripts are especially useful for complex, parametric designs, but also for relatively simple tasks like automatic numbering of chips. In version 5, many more features were added.

The most important improvements in version 5 of CleWin include:

With CleWin version 5.3 a fully 64-bit version of the program was introduced. Furthermore, rendering to the screen has been redesigned and now uses parallel threads to fully exploit the potential of modern processors with multiple cores.

Other utilities

The following utilities are currently available:

The utilities are included with the CleWin software or available separately for € 95 each.

Demo versions

A free demo version of CleWin can be downloaded from our Downloads page. This demo version is fully operational except that you cannot write to file. A fully functional evaluation version is available on request. Simply send an e-mail to


CleWin 5 can be ordered directly from WieWeb software by sending us a purchase order by fax (x-31-84-438-5356) or e-mail.

We accept Visa and American Express credit card payments. Please contact us for a credit card order form.