Devices

The team’s proficiency in material synthesis and processing of wide bandgap (WBG)-based compounds lead to the development of a diverse number of novel chip-based devices and structures for unique applications in harsh environments, among which are the following:

The ability to configure, model, fabricate, and integrate these microstructures into unique functional devices is another invaluable asset, which allows IMS to provide innovative and practical solutions for a diverse number of advanced applications.

Our Capabilities relating to devices focuses on:

  • Modeling & Design

  • Processing & Fabrication

  • Prototyping & Testing
     

Modeling & Design:

The envisioned design and simulation capabilities at IMS include: large-scale multiphysics coupling software for MEMS design, optics, RF & microwave applications, heat transfer, acoustics, chemical engineering, and structural mechanics. Specific commercially available software packages are regularly utilized to design, simulate, and solve several virtual structure, device, and system with unlimited physical parameters and coupled physical phenomena.  Features, like in-plane electric current module, are used to simulate the effective properties of nanofiller/polymer composite capacitors, enabling prediction of the nanocomposite’s percolative behavior for different loadings of the nanofiller at different frequencies.  The software package extends its design capability to associate with CAD design to optimize meshing and physical parameters.

Prior to fabricating any of the solid state optical and electronic devices, modeling is performed in order to project their overall performance.  Our in-house expertise in theoretical modeling is adept in utilizing industry standard design software packages, as well as custom-designed versions, which are suitable for modeling and studying of all electrical, optical, mechanical, thermal, and other physical parameters as a prerequisite to performance validation.  Typical modeling parameters include: band diagrams, device selectivity and efficiency, charge, electric field, potential, photocurrent, and quantum- well potential distributions, and 2-D Electron Gas confinement.  To model physical parameters of the structures, a Finite Element Analysis (FEA) software package is used with the ability to couple several electrical and physical parameters, such as, strain dependence on temperature caused by varying current loads, or temperature dependence of various materials with different emissivity and construction for space applications (high temperature and high radiation environments). This gives us the capability of studying the coupled effect of electrical, mechanical, thermal and optical properties of various structures.
 

Processing & Fabrication:

IMS uses its unique capabilities in growth and real-time film-monitoring technology.  The use of ion-assisted (or neutral-assisted) physical vapor deposition (PVD) technique serves as an advantage to produce high quality films.  Our approach is also to make use of the unique in-house capability of in-situ Mass Spectrometry of Recoiled Ions/Diffuse Reflectance Spectroscopy (MSRI/DRS) instrumentation for real time growth monitoring of thin film coatings to resolve problems related to coating stability, large area uniformity, and substrate/coating adhesion, as well as coating/lubricant interaction, intermixing and breakdown.

IMS has developed a unique photo-enhanced reactive ion etching process, for the processing of III nitride thin film materials. The process allows us to improve the etch rates at lower RF power levels and thus reduce ion bombardment-induced damage.  Other standard processing equipment is also available, in a class-100 cleanroom facility, including photolithography, etching, and metal deposition.  Photolithography performed by using a Kasper mask aligner allows for achievement of features as small as 1µm, while a JEOL JBX 5500FS, electron beam writer allows for generating features as small as 10 nm.  Both Wet-etching and Dry-etching capabilities are available for a wide range of materials, including silicon dioxide, silicon, GaN, AlGaN, AlN, InN, and InGaN. An ultra-high vacuum electron beam evaporation system is the primary equipment used in the deposition of metals for either Ohmic or Schottky contacts.  Metals such as Ti, Al, Au, Pt, Cr, and Ni, can be precisely deposited with the capability of depositing four (4) metal layers at a time.
 

Prototyping & Testing:

A dedicated ion source-assisted PVD reactor is ready to carry out growth and metallization experiments needed for optoelectronic devices (for example capacitors) prototyping. The entire electrical, thermal, and frequency response characterization tools needed for testing the device characteristics measurements and performance evaluation are readily available.

Prototyping of optoelectronic devices is performed through fabrication and testing of experimental device structures and systems. Optoelectronic device characterizations include, spectral response and quantum efficiency determinations using UV and VIS/IR illumination sources.  Electrical evaluation of layers is achieved through capacitance-voltage, current-voltage, and Hall Effect techniques.

Besides modeling of the active device structures, the team is proficient in offering custom-designs, advanced assembly, and packaging techniques. Among other capabilities, we can offer focused studies to investigate environmental impact on the performance, lifetime, and reliability of these prototyped structures and packaged devices using conventional speed-aging techniques and simulated real ambient conditions.  In addition, through our collaborative programs, we have access to a wide spectrum of equipment for testing these devices at and after high impact mechanical, thermal, and radiation stresses.

As a standard practice to support the development and prototyping phase, we have adopted rigorous documentation process to provide a preliminary set of technical documentation that includes manuals, procedures, process traveler charts, specifications, and application notes.  For selected prototype-devices and upon established agreement with the customer, we will extend our assistance to conduct and compile an initial marketing research and estimated production cost evaluations. 

For more information, please contact us directly.