Process variation

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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Coventor in the News – Silicon Photonics

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Coventor in the News

Photonics in Silicon R&D Toward Tb/s

By Ed Korczynski, Sr. Technical Editor, Semiconductor Manufacturing & Design

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The client:server computing paradigm colloquially referred to as the “Cloud” results in a need for extremely efficient Cloud server hardware, and from first principles the world can save a lot of energy resources if servers run on photonics instead of electronics. Though the potential for cost-savings is well known, the challenge of developing cost-effective integrated photonics solutions remains. Today, discrete compound-semiconductor chips function as transmitters, multiplexers (MUX), and receivers of photons, while many global organizations pursue the vision of lower-cost integrated silicon (Si) photonics circuits. read more…

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Achieving the Vision of Silicon Photonics Processing

By: Sandy Wen, MSEE, Semiconductor Process and Integration Engineer, Coventor

Silicon Photonics Test Die

Silicon Photonics Test Die

With the increasing need for faster data transfer rates, the transition from electrical to optical signaling in data processing is inevitable.   Copper cabling cannot keep up with the upcoming data center bandwidth requirements, for applications such as multimedia streaming and high performance computing.  One technology that could enable true optical communication is silicon photonics. read more…

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