A novel scan chain diagnostics technique based on light emission from leakage current

2005 ◽  
Author(s):  
P. Song ◽  
F. Stellari ◽  
T. Xia ◽  
A.J. Weger
Keyword(s):  
Leakage Current ◽  
Light Emission ◽  
Scan Chain

Broken Scan Chain Diagnostics Based on Time-Integrated and Time-Dependent Emission Measurements

2004 ◽  
Author(s):  
Franco Stellari ◽  
Peilin Song ◽  
Alan J. Weger ◽  
Tian Xia
Keyword(s):  
Failure Analysis ◽  
Leakage Current ◽  
Light Emission ◽  
Circuit Analysis ◽  
Time Dependent ◽  
Optical Technique ◽  
Base Method ◽  
Scan Chain

Abstract Light Emission due to Off-State Leakage Current (LEOSLC) is used in combination with the Picosecond Imaging Circuit Analysis (PICA) method to effectively diagnose and localize defects in a broken scan chain. As usual, the emission base method shows to be very effective in debugging the problem; the defect is successfully identified by the optical technique and confirmed by Physical Failure Analysis (PFA).

Analysis of 0.13 μm CMOS Technology Using Time Resolved Light Emission

2004 ◽  
Author(s):  
Peter Ouimet ◽  
Jason Goertz ◽  
Olivier Rinaudo ◽  
Lousinda Long ◽  
Simon Yeung
Keyword(s):  
Light Emission ◽  
Cmos Technology ◽  
Case Histories ◽  
Time Resolved ◽  
Scan Chain

Abstract This paper describes case histories of 0.13 um bulk CMOS technology analyses using Time Resolved Light Emission (TRLEM). Using this technique, scan chain, timing, and logic failures are shown to be quickly and decisively identified thereby meeting the need for rapid feedback on 1st silicon failures and process excursions.

Testing and Diagnostics of CMOS Circuits Using Light Emission from Off-State Leakage Current

2004 ◽  
Vol 51 (9) ◽  
pp. 1455-1462 ◽  
Author(s):  
F. Stellari ◽  
P. Song ◽  
J.C. Tsang ◽  
M.K. McManus ◽  
M.B. Ketchen
Keyword(s):  
Leakage Current ◽  
Light Emission ◽  
Cmos Circuits

Three-Color Passive-Matrix Pixels Using Dye-Diffusion-Patterned Tri-Layer Polymer-Based LED

2001 ◽  
Vol 708 ◽  
Author(s):  
Ke Long ◽  
Florian Pschenitzka ◽  
J. C. Sturm
Keyword(s):  
Leakage Current ◽  
Light Emission ◽  
Layer Structure ◽  
Single Layer ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Reverse Leakage Current ◽  
Dye Diffusion ◽  
Current Rectification ◽  
Doped Polymer

ABSTRACTDry dye-printing and solvent-enhanced dye diffusion were used to locally dope a previously spin-coated poly(9-vinylcarbazole) (PVK) polymer film with different dyes to fabricate side-by-side RGB OLED pixels. To reduce reverse leakage current and raise efficiency, a blanket tris-8-hydroxyquinoline aluminum (Alq) electron transport layer (ETL) was deposited over the polymer layer after the dye diffusion step, along with a 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) hole/exciton blocking layer between the Alq and the PVK to ensure all light emission occurred from the doped polymer and not from the Alq. Devices with this tri-layer structure have an extremely low reverse leakage current (rectification ratio of 106 at +/- 10V) and a higher external quantum efficiency (∼1%) than single layer devices. A three-color passive-matrix test array with 300μm x 1mm RGB subpixels was demonstrated with this structure.

scholarly journals Micropyramid Vertical Ultraviolet GaN/AlGaN Multiple Quantum Wells LEDs on Si(111)

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Yuebo Liu ◽  
Honghui Liu ◽  
Hang Yang ◽  
Wanqing Yao ◽  
Fengge Wang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Leakage Current ◽  
Light Emission ◽  
Uv Light ◽  
Multiple Quantum ◽  
Threading Dislocations ◽  
Nonradiative Recombination ◽  
Small Current ◽  
Uv Led ◽  
Optical Output

Micropyramid vertical GaN-based ultraviolet (UV) light-emitting diodes (LEDs) on Si(111) substrate have been fabricated by selective area growth to reduce threading dislocations and the polarization effects. There is no-light emission at the bottom and six planes of the pyramid at lower current due to the leakage current and nonradiative recombination of the dislocation at the bottom and the 90° threading dislocations (TDs) at six planes of the pyramid, and the top of the pyramid is the high-brightness region. The micropyramid UV LED has a high optical output intensity under a small current injection, and the series resistance of unit area is only a quarter of the conventional vertical LEDs, so the micropyramid UV LED would have a high output power under the drive circuit. The reverse leakage current of a single micropyramid UV LED is 2 nA at −10 V.

On the Investigation of Power and Reliability Performance of Pseudomorphic AlGaAs/InGaAs HEMT's

1996 ◽  
Vol 421 ◽  
Author(s):  
G.P. Li ◽  
Y.C. Chou ◽  
Y.C. Chen ◽  
C.S. Wu ◽  
K.K. Yu ◽  
...  
Keyword(s):  
Leakage Current ◽  
Surface Passivation ◽  
Light Emission ◽  
Device Simulation ◽  
Emission Spectra ◽  
Gate Current ◽  
State Breakdown ◽  
Reliability Performance ◽  
Surface Leakage ◽  
The Impact

AbstractIn this work, power and reliability performance of pseudomorphic AIGaAs/InGaAs HEMT's are investigated by 2-D device simulation, spatially-resolved electro-luminescence, light emission spectra analysis, and gate current instabilities. A two-dimensional device simulation was used to exploit the off/on state breakdown origins in the power PHEMT's and to explore the physical mechanisms responsible for light emission in both conditions. A correlation between simulated results and light emission spectra highlights the breakdown origins in PHEMT's.PHEMT's subjected to off-state breakdown stress and on-state hot carrier stress show changes in device characteristics. While gate leakage current, i.e. a surface leakage component associated with the surface passivation layer is reduced by these stresses, a reduction in drain current, transconductance degradation, and an increase in the impact ionization generated gate current are also observed.Further improvement in off/on state breakdown voltages and device reliability calls for device structure optimization for lower electric field design, surface passivation treatment for lower surface leakage current, and Schottky barrier enhancement for lower gate current.

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

Scanning luminescence x-ray microscopy: Progress toward selective staining using microspheres

1994 ◽  
Vol 52 ◽  
pp. 74-75
Author(s):  
C. Jacobsen ◽  
J. Fu ◽  
S. Mayer ◽  
Y. Wang ◽  
S. Williams
Keyword(s):  
Visible Light ◽  
Active Sites ◽  
Light Emission ◽  
Chinese Hamster ◽  
Polystyrene Spheres ◽  
Good Resistance ◽  
X Ray ◽  
Selective Staining ◽  
Visible Light Emission ◽  
Specific Labelling

In scanning luminescence x-ray microscopy (SLXM), a high resolution x-ray probe is used to excite visible light emission (see Figs. 1 and 2). The technique has been developed with a goal of localizing dye-tagged biochemically active sites and structures at 50 nm resolution in thick, hydrated biological specimens. Following our initial efforts, Moronne et al. have begun to develop probes based on biotinylated terbium; we report here our progress towards using microspheres for tagging.Our initial experiments with microspheres were based on commercially-available carboxyl latex spheres which emitted ~ 5 visible light photons per x-ray absorbed, and which showed good resistance to bleaching under x-ray irradiation. Other work (such as that by Guo et al.) has shown that such spheres can be used for a variety of specific labelling applications. Our first efforts have been aimed at labelling ƒ actin in Chinese hamster ovarian (CHO) cells. By using a detergent/fixative protocol to load spheres into cells with permeabilized membranes and preserved morphology, we have succeeded in using commercial dye-loaded, spreptavidin-coated 0.03μm polystyrene spheres linked to biotin phalloidon to label f actin (see Fig. 3).

Sign in / Sign up

Export Citation Format

Share Document