Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Distribution of Fraunhofer IISB Lithography Simulation Software

Starting from 2008, Fraunhofer IISB will market its advanced and proven lithography simulation models and software algorithms in its development and research simulator Dr.LiTHO. The software can be purchased from Fraunhofer IISB. The cooperation with SIGMA-C, now part of Synopsys, will no longer be continued.

The Fraunhofer IISB lithography simulation software will be distributed as the Dr.LiTHO [1, 2] software package. Dr.LiTHO was formerly used as the internal development and research lithography simulator of Fraunhofer IISB and can now be purchased from this institute. This direct approach to market replaces the collaboration with SIGMA-C. Following the acquisition of SIGMA-C by Synopsys, Synopsys and Fraunhofer IISB could not reach a new agreement on the terms for continuing the cooperation.

The Munich-based software house SIGMA-C has been the sales partner for the simulation algorithms developed by Fraunhofer. As frequently published during this long-lasting cooperation between Fraunhofer IISB and SIGMA-C, important kernel algorithms of the established lithography simulators SOLID-C, SOLID-EUV, and SOLID-E were developed at Fraunhofer IISB. This, among others, includes FDTD [3] and the Waveguide Method [4] for the rigorous simulation of light diffraction from optical masks and extensions thereof for the modeling of EUV masks [3], for lithographic exposures over topography [5], and decomposition techniques for the fast rigorous simulation of larger mask areas [6].

The Fraunhofer software Dr.LiTHO includes revised and optimized versions of the Waveguide Method for the rigorous simulation of mask diffraction effects, mesoscopic models for the description of line edge roughness (LER), and several interfaces for the coupling of lithography simulation flows with external academic or commercial simulators, in addition to standard simulation models which were also included in SOLID-E.

Dr.LiTHO employs a user concept based on the modern programming language Python. This approach offers wide portability, various methods for parallelization, easy-to-use visualization components, and much more [1, 2]. Dr.LiTHO can be easily adapted to the modeling of alternative lithography techniques such as interference exposures, near field lithography, and/or contact and proximity printing. Optionally, Dr.LiTHO can be combined with the advanced optimization tools of Fraunhofer IISB [1]. Additional capabilities and interfaces will be added to Dr.LiTHO through future research and development.

In the future, the advanced lithography simulation algorithms of Fraunhofer IISB will also be combined and commercialized in combination with various simulation and metrology tools of academic research groups and commercial suppliers. New developments in the distribution of the IISB simulation software, including strategic alliances, will be published on our web site [1]

and on appropriate occasions elsewhere.

A user group will be established to support the industrial application and further development of Dr.LiTHO. Fraunhofer IISB will support members of this user group to adapt the simulation algorithms of Dr.LiTHO to their specific purpose. The requirements as defined by the user group will have a strong impact on the further development of Dr.LiTHO, both for "traditional applications" of lithography simulation in projection printing for semiconductor fabrication and for alternative lithographic technologies and areas of application.

The Fraunhofer IISB lithography simulation group has a long-standing history in lithography simulation. Almost 20 years ago Wolfgang Henke, at that time at Fraunhofer IMT, started to develop algorithms for the simulation of lithographic projection printing processes [7]. Today, the lithography simulation group of Fraunhofer IISB led by Andreas Erdmann employs 8 scientists and PhD students with various backgrounds in physics/optics, electrical engineering, and computer science.

[2] T. Fühner, T. Schnattinger, G. Ardelean, and A. Erdmann: "Dr.LiTHO - a development and research lithography simulator", Proc. SPIE 6520 (2007) 65203F-1
[3] A. Vial, A. Erdmann, T. Schmöller, and C.K. Kalus: "Modification of boundaries conditions in the FDTD algorithm for EUV masks modelling", Proc. SPIE 4754 (2002) 890
[4] A. Erdmann and P. Evanschitzky: "Rigorous mask modeling using waveguide and FDTD methods", SIGMA-C User Workshop Japan, 21. April, 2006
P. Evanschitzky and A. Erdmann: "Fast near field simulation of optical and EUV masks using the Waveguide Method", Proc. of SPIE 6533 (2007) 65530Y
[5] A. Erdmann, C.K. Kalus, T. Schmöller, Y. Klyonova, T. Sato, A. Endo, T. Shibata, and Y. Kobayashi: "Rigorous simulation of exposure over nonplanar wafers", Proc. SPIE 5040 (2003) 101
[6] A. Erdmann, C.K. Kalus, T. Schmöller, and A. Wolter: "Efficient simulation of light diffraction from 3-dimensional EUV-masks using field decomposition techniques", Proc. SPIE 5037 (2003) 482

[7] W. Henke, R. Schwalm, M. Weiss, and J. Pelka: "Diffraction effects in submicron contact/proximity printing", Microelectronic Engineering 10 (1989)

Fraunhofer Institute of
Integrated Systems and
Device Technology (IISB)
Lithography Simulation
Dr. Andreas Erdmann
Phone +49 (0) 9131 761-258
Fax +49 (0) 9131 761-212

Dr. Andreas Erdmann | Fraunhofer-Gesellschaft
Further information:

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>