Thread

Introduction
Screenshots
License
Download
Userinterface
Function Index
White Papers
Community
Contact

Use your OpenID:

getopenID

no help

FreePDK, MOSIS

by anonymous - 10 Feb 2010, 15:06 CET

In the latest Mosis library, I noticed that some of the GDS cells are missing (e.g. pads, standard cells). Is this because of NDA issues, or is this because the GDS files are for a particular technology node (whereas the MOSIS rules are scalable)?

And about the openCellLibrary: I noticed that some of the required spice models were missing (the transistor models). I registered at nangate.com and downloaded the kit to have access. So to those interested in simulating with the 45nm lib: please register at nangate.com as well to have access to the transistor models (until they are included with any future LayoutEditor rev).

BR, Niels

by Juergen Thies - 10 Feb 2010, 15:30 CET

Mosis Library and openCellLibrary are intended as an example and/or template library. Shipping all parts of these libraries will multiply the required disk space. As there exists different technologies, transistor models, etc. a adaption by the user is always required for a productive use and a download of the main library components from the library provider will also guarantee the use of the most recent version.

Please log in to post!

The LayoutEditor™ is a program to design and edit layouts for MEMS/IC fabrication and CMOS IC design .Designing these layouts require a high precision. In IC design a sufficient resolution and a possibility of a high scaling is required. The resolution of the LayoutEditor can be set in a wide range and is normally set to 1 nano meter. A higher resolution makes no sense due to atomar structures. With this resolution the LayoutEditor can draw elements up to 4 meters. In many IC design houses this is enough for IC/MEMS which extend usually less than 0.1 meters. The productions of MEMS/IC is done in many layers. For each of these physical CAD layers a belonging layer had to exist in the drawing. Additional logical layers are required for describing/naming purpose. So a lot of layers are needed. By default the LayoutEditor is limited to 128 layers. But it can easily be adjusted, if more layers are required. IC Designs often contain a plenty of repeating structures. Essential for micro fabrication of these designs is therefor a hierarchical design. This means, that the complete repeating structure only exists once in a single cell. These cell is then referred multiple times in the main drawing.
Beside the above mems packaging mentioned IC design fundaments it is important to have sophisticated functions to handle all drawing elements. The layout handler has all required functions: all basic design functions, all angle elements, boolean operations, macros, fontgenerator, design rule checker, mems tools, supported format: GDSII, DXF, OASIS, CIF. If you still missing a function, you are free to write a feature request

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