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Professional

Brion (Computational lithography)

Staff design engineer (R&D) June 2010 – present

• Currently working on a gauge creation algorithm
  • The purpose of my current work is to design calibration gauges that improve the prediction power of a model
  • The problem is to find a limited number of gauges that make a model accurately predict a full chip contour
• Created a Lua-scriptable EDA tool (Electronic design automation) for mask creation
  • Designed the software architecture from the ground up and implemented it in C++.
  • Lowered design turn-around time from several months to 2 days
  • Used to design two $100k masks
  • Program now shipped to customers
• Maintenance, improvements, and bug fixes of the C++ code on a network-distributed, p4 source-controlled code base

Senior Engineer (R&D) (2.5 years)

• Creating of symmetry-aware bilinear form tuning algorithm
  • A lithography scanner can be modeled with Fourier Optics. The model can be diagonalized into a bilinear operator called a TCC (Transmission cross coefficient)
  • I studied the group symmetries (D2, D4, O2) of the illumination path, both on the raw 4D TCC and on its 2D eigenvectors
  • I devised and implemented a C++ algorithm
  • US Patent under review
• Creation of a gauge selection algorithm
  • The calibration of a model requires the measurement of some input gauges, but the metrology burden imposes a limit on the numbers of gauges our customers can measure.
  • I created a new selection algorithm that reduces the metrology burden while having a very small impact on the predictive power of the calibrated model
  • For this project, I was the lead investigator, but I interacted with other engineers for advice and discussion
  • US Patent under review
• Created and implemented new model for resist process
  • Extensive experimentation with measured data
  • Estimation of fitting and prediction power, overfitting mitigation, and stability enhancement
  • This model requires very limited human interaction
  • I designed and wrote the entire C++ code for the model fitting, and the code for the use of the model on a full-sized chip using C++, FPGA, and FFTW on a distributed system
  • For this project, I was the lead investigator, but I interacted with other engineers for advice and discussion
  • US Patent application number 20100128969
• Matching of a competitor's model
• Research in tuning of parent company's scanners (Not lead engineer)
• Maintenance, improvements, and bug fixes of the C++ code on a network-distributed, p4 source-controlled code base

Philips Medical Systems (Machine medical diagnostic)

Intern (3 summers)

• Improved on automated EKG interpretation algorithms for cardiographs
• Created proprietary algorithm for measurement of QRS-T loops using vectorcardiography
• Measured effect of in-house lead transformation algorithms on diagnostic performance
• Wrote denoising and onset/offset detection algorithms using wavelets
• Wrote optical waveform recognition algorithms
• Wrote EKG marking program for the rest of the team
• Languages used: C++, C#, Basic, MATLAB, Unix scripts

Mount Rainer GSI

Bellman at the main hotel of Mount Rainier National Park (1 Summer)

OSC Solutions (Startup)

Employee number 1 (1 summer)

• Setup startup company's IT infrastructure (Setup LAN, Source Control Server)
• Used Java/WebObjects to create prototype for Enterprise Resource Planning program
• Finalized customer management and production logistic sections
• Used ReportMill to generate reporting files and bills
• Languages used: Java, SQL, Unix scripts

LSV Communication (Internet startup)

Intern (1 summer)

• Programmed a shopping cart for a real-estate advertisement website
• Developed a mailing-list database allowing customers to receive weekly and personalized updates
• Languages used: 4D, JavaScript