Author Archives: Sandra Liu

Senior C++ Computational Physics/Math Developer for Semiconductor Applications – Waltham, MA

Senior C++ Computational Physics/Math Developer for Semiconductor Applications – Waltham, MA

At Coventor, a Lam Research company, we build innovative software products to solve semiconductor technology challenges.  Our 3D modeling software is revolutionizing the way that semiconductor chips are fabricated around the world.  Enabled by our core intellectual property – an accelerated 3D voxel modeling and visualization engine – our software is evolving fast as our business and customer base expands rapidly.

Coventor’s modeling team builds the core capabilities of SEMulator3D; the ability to model a wide variety of physical phenomena accurately and efficiently using a variety of numerical techniques.  As a key member of our modeling team you will implement new algorithms for modeling a wide range of semiconductor processes and phenomena such as plasma etching, chemical-mechanical polishing, and electrical behavior.  This is a hands-on software development position, requiring proficiency in C++ and expertise in and physical modeling. Your title, level of responsibility, creative freedom and salary will be commensurate with your education and experience.

Great engineering is Coventor’s heart and soul.  Our software is envisioned and created by world-class engineers in many disciplines: software engineering, numerical physics, statistics, electrical engineering, quality assurance and development operations.  Since our inception as an MIT spin-off, we’ve focused on agility by enabling individuals to take initiative and find innovative solutions to hard problems.  With our recent acquisition by Lam Research we have access to many more resources, and exciting opportunities for collaboration within the company. We are looking to hire engineers with broad skills who are ready to contribute in multiple ways, to enable our customers’ success.


  • Research, prototype and characterize methods for simulation of physical phenomena associated with fabrication and/or behavior of nanoscale semiconductor devices
  • Implement new modeling algorithms in C++, using and extending existing modeling infrastructure and APIs
  • Optimize algorithms for speed, including profiling and parallel implementation
  • Participate in general software engineering tasks, including verification, testing, bug fixing and maintenance of existing code


Required Qualifications (all of the following):

  • PhD in Engineering or Physical Science discipline, or Computer Science with a numerical simulation focus.
  • Direct experience implementing modeling/simulation algorithms in three dimensions, using methods such as finite-difference, finite-element, particle, atomistic, cellular automata etc.
  • Strong  C++ coding skills, including use of the standard template library
  • Strong math skills, including a thorough knowledge of calculus
  • Desire to collaborate, contribute to, and learn from a team


Desirable Qualifications (any of the following):

  • General knowledge of semiconductor processing technology
  • Direct experience with implementation of software solutions for non-linear partial differential equations
  • Experience solving systems outside of the semiconductor space such as convection-diffusion or stress/strain
  • Experience in modeling or fabrication of nanoscale semiconductor devices
  • Experience with cross-platform development, on Windows and Linux
  • Experience with one or more of: Boost, C++11 or later, Python
  • Experience programming GPUs for simulation (GPGPU using Cuda or the like).


This regular, full-time position is located in Waltham, MA. Coventor offers comprehensive benefits and is an EEO/AA Employer. You must be a current legal resident of the U.S. or have a valid U.S. visa to apply for this position.  Please e-mail your cover letter and resume to


From Movies to Data Analysis – Coventor’s SEMulator 3D Pivots

If you’ve been paying attention to the various papers at various advanced semiconductor process conferences, there’s a name you’re seeing more and more: Coventor. We’ve looked at them several times before, in the context of both their SEMulator 3D tool and their MEMS+ tool – the former for development of new semiconductor processes and the latter for designing MEMS devices.

Today we’re focusing on the SEMulator 3D tool, whose 6.1 version was recently announced. We’re doing so because the tool has turned a corner on how it’s used. Before going there, let’s talk about where we’ve been first in order to set the stage.

read the full article here

SEMI European MEMS & Sensors Summit 2018 – 19-21 September 2018, Grenoble, France

SEMI European MEMS & Sensors Summit 2018

Silicon Photonics: Solving Process Variation and Manufacturing Challenges

By: Sandy Wen, Principal Engineer

As silicon photonics manufacturing gains momentum with additional foundry and 300mm offerings, process variation issues are coming to light. Variability in silicon processing affects the waveguide shape and can result in deviation in effective indices, propagation loss, and coupling efficiency from the intended design. In this article, we will highlight process variation issues that can occur in silicon photonics manufacturing and discuss techniques to mitigate these effects.

Figure 1. Example test photonic IC, with common elements such as waveguides, grating coupler, MZI, photodetector and fill pattern.

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What’s After FinFETs?

By Mark LaPedus

Chipmakers are readying their next-generation technologies based on 10nm and/or 7nm finFETs, but it’s still not clear how long the finFET will last, how long the 10nm and 7nm nodes for high-end devices will be extended, and what comes next.

The industry faces a multitude of uncertainties and challenges at 5nm, 3nm and beyond. Even today, traditional chip scaling continues to slow as process complexities and costs escalate at each node. As a result, fewer customers can afford to design chips around advanced nodes.

read the full article here.

“Problems and Solutions at 7nm” – David Fried Video Interview with Semiconductor Engineering

David Fried, Chief Technology Officer of Coventor, has a discussion with Ed Sperling of Semiconductor Engineering about what’s going on at 7nm, and some of the problems that we’re starting to experience at both 7nm and 5nm.

[Video Attribution: Semiconductor Engineering] read more…

The Future of MEMS Design: Making MEMS Design More Like CMOS Design

By: Christine Dufour, MEMS PDK Program Manager

MEMS-based component suppliers want to rapidly ramp their designs into high-volume production.  This demand is driving MEMS suppliers to focus on ways to more efficiently re-use established process steps, stacks or technology platforms. To meet this need, we see the emergence of standard MEMS technology and design platforms similar to those used in CMOS design.

The semiconductor industry and EDA vendors have established integrated design environments based on PDKs (Process Design Kits), standard cell libraries, memory architectures, and IP, to give easy access to the technology for IC designers and increase chances of first-pass successful silicon. Coventor’s vision is that the MEMS eco system and MEMS EDA software vendors should play a similar role in accelerating MEMS product development. read more…

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3D Model-Based Process Control for the Future of Smart Manufacturing

David Fried’s, CTO of Coventor, gave a presentation entitled “3D Model-Based Process Control for the Future of Smart Manufacturing” at SEMICON West 2017.

Listen to this presentation to gain an understanding of high-speed 3D process modeling and how model-based process control can be used to improve process yield of advanced semiconductor technologies.

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