Senior Device Engineer with experience of managing multiple projects. Expertise in electromagnetic modeling of integrated transformers, antennas, RF devices, and RF characterization of on-chip integrated devices, magnetic thin films, magnetic material characterization, micro-manufacturing, inductive digital isolation, high voltage breakdown of polyimide. With strong background of both electrical engineering and physics.
8 years of experience in electromagnetic modeling of
integrated inductors/transformers, capacitors, planar waveguides and antennas with HFSS, Designer, Q3D, Momentum Matlab, etc.
Extensive knowledge of inductive digital isolation
Extensive knowledge of high voltage endurance of polyimide
2 years of experience in electromagnetic emission modeling at both PCB and IC chip level
6 years of experience in semiconductor micro-fabrication
Expert-level knowledge of soft magnetic thin films and magnetic sensors
8 years of experience in RF characterization (s-parameter) with vector network analyzer
8 years of experience in magnetic material characterization
Proficient with Cadence Virtuoso, LabView, Matlab
Proficient with statistics software (Weibull), curve fitting tools (SigmaPlot) and CAD tools like AutoCAD
Senior Device Engineer10/2011
to Current Analog Devices Inc – MA
Designed ADI's 2nd generation isoPower® transformer -- integrated magnetic core transformer. This technology is able to increase the power efficiency and reduce the electromagnetic emission.
Continually designed and generated electromagnetic models (.s4p) of integrated air-core transformers for
iCoupler® digital isolator
Developed the modeling methodology of the PCB level electromagnetic emission, including the effect from the IC chips mounted on board.
On-wafer characterized the electromagnetic models and extracted the discrete models of the integrated transformers.
Lead the product line efforts of high voltage characterization,
including experiment plan, experimental test chip layout design and test system build-up.
Analyzed the high voltage endurance and surge test failures of the iCoupler® products.
Characterized and analyzed the high voltage lifetime dependency of different test conditions, i.e. humidity, temperature, frequency, voltage stress waveform, etc.
Continually improved the high voltage insulation capability of the digital isolators by improving the semiconductor micro-fabrication processes of the integrated transformers and by optimizing the transformer layout design.
Continually served as the interface between the product line and the foundry.
Continually responded to high voltage performance related inquiries from customers, including breakdown mechanism and lifetime of products under different conditions.
Formulated the strategy and responded to the feedback from competitors during an IEC standard updating process.
to 10/2011 Analog Devices, Inc – MA • Designed and modeled the integrated transformers with magnetic cores with Matlab, HFSS and Momentum.
• Performed the layout design with Cadence Virtuoso • On-wafer Probed the integrated components with vector network analyzer and extracted the discrete models in Matlab.
to 06/2011 Northeastern University
Designed and modeled on-chip magnetic-core solenoid inductors and transformers with Matlab.
Designed the micro-fabrication process for the integrated inductors and transformers and also performed the fabrication.
Characterized the magnetic property and the s-parameters of the integrated inductors and transformers, and also extracted the equivalent inductance, resistance, quality factor, coupling factor and maximum gain of them.
Layout design and micro-fabrication of the AMR (anisotropic magneto-resistance) and GMR (giant magneto-resistance) sensor on Si wafers.
Deposited and studied FeCoB/Al2O3 multilayer magnetic films with varied thickness of the Al2O3 layers, by measuring the ferromagnetic resonance, permeability spectrum and hysteresis loop.
Designed and fabricated the world's first non-linear vibration energy harvester with high permeability material, which could generate a power of over 1 mW/cm3. This device converted the vibration energy to electrical energy through a solenoid with a cantilever core made of soft magnetic material.
Designed and fabricated the 2nd generation non-linear vibration energy harvester which could generate a power of over 20 mW/cm3. This device converted the vibration energy to electrical energy through two fixed magnetic-core solenoids and a vibrating magnet pair.
Performed electromagnetic modeling of the patch antennas and annual ring antennas and studied loading effects of different self-biased magnetic films (PVD deposited) on the antennas.
Performed prototype design, HFSS simulation and micro-fabrication of a series of magnetic thin film (PVD deposited FeCoB, FeGaB, NiFe) applied on-chip RF devices, including FMR based electrically tunable band-stop filters, phase shifters, resonators, transmission lines, etc.
Built the in-house ferromagnetic resonance test system, including the Labview interface and equipment set up.
to 08/2007 Northeastern University Teaching assistance of the college physics courses, including physics labs and lectures.