Keyword: Semiconductor devices

Briefs: Nanotechnology
The transistors enable power converters to perform at substantially improved efficiencies, especially in high-power applications.
Articles: Photonics/Optics
A "TPSI" process makes it possible to distinguish between the front and back of optical surfaces, and to characterize the quality of both in a single measurement.
Briefs: Lighting

NASA Langley Research Center has developed a double-sided Si(Ge)/ Sapphire/III-Nitride hybrid structure. This technology uses both sides of a sapphire wafer to build device...

Briefs: Imaging
Visualizing Motion of Water Molecules for Liquid-Based Electronics

A high-resolution inelastic x-ray scattering technique was used to measure the strong bond involving a hydrogen atom sandwiched between two oxygen atoms. This hydrogen bond is a quantum-mechanical phenomenon responsible for various properties of water, including viscosity, that...

Briefs: Communications

Silicon is a naturally occurring material commonly used as a semiconductor in electronic devices; however, researchers have exhausted the potential of devices with semiconductors made...

Technology Leaders: Energy

Photovoltaic systems are continually evolving to improve their efficiency and financial viability. One trend is to move to larger strings of cells giving higher dc voltages to be...

Briefs: Materials

A material was developed for nuclear radiation detection that could provide a significantly less expensive alternative to the detectors now in commercial use. Specifically, the high-performance material is...

Briefs: Communications

Demands for improved computer processing power have led researchers to explore both new processes and other materials beyond silicon to produce electronic components....

Briefs: Electronics & Computers

Power electronics used for routing, control, and conversion of electrical power traditionally utilize silicon semiconductors. These systems tend to be bulky, require active cooling, and are inadequate for...

Briefs: Electronics & Computers

High-voltage wide bandgap (WBG) semiconductor devices like 15-kV silicon carbide (SiC) MOSFETs have attracted attention because of potential applications in high-voltage and high-frequency power...

Briefs: Electronics & Computers
Integrated Three-Dimensional Module Heat Exchanger for Power Electronics Cooling

Critical elements in the operation of electric drive systems are power electronics and power semiconductor packages. Improving thermal management of power electronics can help reduce the cost, weight, and volume of electric drive systems, and thus increase market...

Facility Focus: Research Lab

Opened in 1947 on the former site of the U.S. military's Camp Upton in New York, Brookhaven National Lab's (BNL) initial mission centered on the peaceful exploration of the atom. Particle accelerators, leading...

Briefs: Test & Measurement

Before a new high-power semiconductor device can be used for industrial applications, it must be thoroughly tested to determine if it will survive environmental stresses and continue to meet...

Briefs: Electronics & Computers

Researchers at NASA’s Glenn Research Center have developed a revolutionary new generation of silicon...

Briefs: Software
Mesh Adaptation Module for Cartesian Meshes with Embedded Boundaries

This work extends the mesh generation capability of NASA’s Cart3D flow simulation software package to permit cell-by-cell mesh enrichment. Cart3D allows users to perform automated Computational Fluid Dynamics (CFD) analysis on a complex geometry. It includes utilities for...

Briefs: Electronics & Computers
Advanced, Ultra-Low-Loss, High-Frequency Package Module

As electronic circuits approach submillimeter wavelength frequencies (300 GHz) and higher, the traditional low-loss method of packaging electronic circuits in waveguide modules for guiding the signal requires more attention. The reasons are that circuits at higher frequencies have lower...

Briefs: Manufacturing & Prototyping
Ohmic Contact to N- and P-Type Silicon Carbide

Electrical ohmic contacts can be simultaneously formed on silicon carbide (SiC) semiconductors having donor and acceptor impurities (n- and p-type doping, respectively). This implies that such contacts can be formed on SiC layers in one process step during the fabrication of the semiconductor...

Briefs: Electronics & Computers

A high-temperature-capable widebandgap semiconductor power module package, coupled with a new high-temperature- capable bonding process...

Articles: Imaging

Thermal imagers allow a user to see an object’s heat signature, and heat provides an entirely different set of performance data than the visible spectrum available to the...

Briefs: Electronics & Computers
Impedance Discontinuity Reduction Between High-Speed Differential Connectors and PCB Interfaces

High-speed serial communication (i.e., Gigabit Ethernet) requires differential transmission and controlled impedances. Impedance control is essential throughout cabling, connector, and circuit board construction.

Application Briefs: Photonics/Optics

Increasing power densities and decreasing transistor dimensions are hallmarks of many of today’s semiconductor devices, including high-voltage power transistors, laser diodes, and RF power amplifiers....

Articles: Semiconductors & ICs

Part 1 of this article, which appeared in the August 2013 issue of NASA Tech Briefs, dealt with ON-state characterization of high power semiconductors (link to...

Articles: Motion Control

The proliferation of electronic control and electronic power conversion into a variety of industries (e.g., energy generation, industrial motor drives and control,...

Articles: Lighting

A successful LED system design must be able to transfer the active device’s heat efficiently from its own PN junction to the ambient. This path includes the printed circuit board on...

Briefs: Information Technology
Verilog-A Device Models for Cryogenic Temperature Operation of Bulk Silicon CMOS Devices

Verilog-A based cryogenic bulk CMOS (complementary metal oxide semiconductor) compact models are built for state-of-the-art silicon CMOS processes. These models accurately predict device operation at cryogenic temperatures down to 4 K. The models are...

Briefs: Lighting

Nanowires — microscopic fibers that can be “grown” in a lab — have a variety of potential applications, including LEDs and sensors. A team of MIT researchers...

Articles: Lighting Technology

LED, semiconductor, and package designers use complex thermal analysis software to analyze their products, but the analysis is only as good as the data provided. Reliable clarification of heat data upstream and downstream...

Briefs: Photonics/Optics

Spaceflight system electronic devices must survive a wide range of radiation environments with various particle types including energetic protons, electrons,...

Articles: Lighting

Semiconductor-based light-emitting diode (LED) devices first appeared in the 1960s. Today, with the advances in materials, design, and manufacture of LED devices, we are seeing a wide spectrum of LEDs that are cheaper,...

Trending Stories

Briefs: Aerospace

Self-Healing, Recyclable, Shape Memory Polymers

NASA Spinoff: Materials

Nanotechnology Repairs Engine Damage in Cars

INSIDER: Robotics, Automation & Control

Autonomous Robot Opens Doors, Finds Wall Outlets

Application Briefs: Sensors/Data Acquisition

Sensing Hazardous Gases Can Save Lives

INSIDER: Semiconductors & ICs

Smaller, Cheaper, and More Dynamic Computer Chips

INSIDER: Motion Control

Non-Contact Tip/Tilt Sensor