Oct 4, 2006 - Superconducting Quantum. Interference Device (SQUID). â Voltage change due to magnetic flux through SQUID. â High sensitivity to weak ...Missing:
It is the best known method for imaging weak buried currents in a non-destructive way.
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System in Package Challenges
Bumpless Buildup Layer (BBUL) Die buried in the packaging
Stacked Chip 3
How does Magma Work? Magma produces a current density image
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Magnetic Sensors
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Superconducting Quantum Interference Device (SQUID) – Voltage change due to magnetic flux through SQUID – High sensitivity to weak currents at a distance – Best for packaged devices
•
Bz
Magnetoresistive sensors – Resistance change due to magnetic field – High resolution when close to current source – Best for front-side accessible die
Bz 5
Comparison between Sensors 10000 10 mA
Current
11000 mA 100 100 µA 10 10 µA
3 200
M
t e n ag
e v i t s i s o re S
1 µA 1 100 nA 0.1 0.1
ID U Q
6 200
Front Side
1
Back Side
10
Packaging
100
Separation Distance (μm)
1000 6
Magma C30
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C4 Bump Short on Flex Cable Current Overlaid on Optical
Processed X-Ray
Optical
Courtesy of David Vallett, IBM
X-Ray
SEM
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Triple-Stacked Die with Pin Short
Pacheco, Intel, ISTFA 2004
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Magnetic Current Imaging Analysis
Pacheco, Intel, ISTFA 2004
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Dual Stacked Die with High Resistance Image Difference Analysis result Broken Bond Wire
Pacheco, Intel, ISTFA 2004
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High Resolution Imaging
• • •
Following slides show images with a magnetoresistive sensor Needs to be close to the source for high resolution Can achieve nano-scale resolution
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High Aspect Ratio Magnetoresistive Sensor Probe For cavity scanning and scanning near wire bonds or probes Both in-contact and out-of-contact scanning
Laser milled cavity in Flip-Chip device Cavity: 500µm x 500µm x 250µm deep 13
Wire Bonded Device
Current Density Image
Overlay on Optical Image
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Implementation Model
• • • • •
Global scan with SQUID Isolate defective die, bump, wire bond, package, etc. Locally deprocess with laser, FIB, chemical / mechanical means Image with magnetoresistive sensor Finish physical FA
Oct 7, 2002 - Different kind of magnetic sensors exist on the market, which present different ... *Based on variation of resistance due to spin scattering.
Feb 12, 2010 - gency department for dizziness; they were free of neu- ... Gender, witnessed arrest, bystander CPR, initial ECG on admission and cause of ...
Field at center of ring (z = 0): Bz = µ0I. 2R. ⢠Magnetic moment: µ = IÏR. 2. ⢠Field at large distance (z â« R) : Bz â. µ0. 2Ï. µ z3. 28/3/2011. [tsl214 â 6/14]
radiation energy. ... effect with corrections due to the exchange of energy with the zero-point energy ... Coler and von Unruh made up a slightly larger model with.
because of the credible witnesses for a proof of principle for a device that works with ... condensers in a static arrangement he showed that he could obtain a ..... Dehmelt, H., Experiments with an Isolated Subatomic Particle at Rest, Rev. ... Ludwi
The 10th harmonic was chosen because it was close to the 180 kHz that Hans .... Coler stated that the strength of the magnets did not decrease during the operation of ... Some of the important uncertainties of the Coler generator are the material of
E Shamonina, V A Kalinin, K H Ringhofer and L Solymar, âImaging, ... Magnetic Materials for RF Flux Guides in Magnetic Resonance Imagingâ, Science ... The recent development of metamaterials with hitherto unattainable physical properties ... elec
Ten healthy subjects 5 women and 5 men were paid volunteers and ..... w x7 A.P. Georgopoulos, G. Pellizzer, The mental and the neural: Psycho- logical and ... 11 L.M. Parsons, P.T. Fox, J.H. Downs, T. Glass, T.B. Hirsch, C.C.. Martin, P.A. ...
software environment integrating path-planning methods and real-time tracking, a ... analysis, this paper aims to propose a framework to plan a robust pathway to enhance the navigation ability to reach ..... A. Application and Results. In order to ..
MultiProbe 2007. CAD Nav-Driven Probe Positioning. With the piezo-driven SNAP stage it is possible to accurately position probes directly from the CAD-NAV ...
Oct 6, 2010 - Introduction / Eufanet (Philippe Perdu). What is Eufanet and ... 3D (360degree) failure characterization in semiconductor devices using Hitachi's.
characterization of mouse lemur primate brain in normal conditions and during normal .... Body temperature of the mouse lemur is maintained at 30-33°C by using a water-filled .... In animals such as dogs (Bagley, 1997; Borras et al., 1999) or.
Jean Piaget's theory is a central reference point in the study of log- ico-mathematical .... We used fMRI to test this famous two-stage pattern of logico-mathematical performance in an experimental ...... Language or music, mother or Mozart?
Cases included eight cats with feline infectious ... In six cats with lesions in T1- and/or T2-weighted images, ... All CSF samples were collected from the cerebell- ... menace response, ascites ... not thought to be associated with inflammatory.
Magnetic Field Generated by Current in Straight Wire (1). Consider a field point P that is a distance R from the axis of the wire. ⢠dB = µ0. 4Ï. Idx r2 sinÏ = µ0. 4Ï.
The 10th harmonic was chosen because it was close to the 180 kHz that Hans .... Coler stated that the strength of the magnets did not decrease during the operation of ... Some of the important uncertainties of the Coler generator are the material of
Jul 18, 2011 - extensive study of different force-free models for a simple magnetic ..... This particular choice of the vertical current distribution is justified by the.
Apr 10, 2011 - to the torque of a magnetic field in the direction of the reference layer, which has ... We first focus on the results obtained with the 210nm wide wires. ..... We find that the contribution of the spin-transfer torques to the equivale
vertical eye position.20 Listing's law, a specific case of Donders' law, states that ... sense) with respect to ocular rotations.25 The differential con- trol postulate of ...
(F1) were generated by crossing female heterozygotes on the Sv129Pas background with male C57BL/6N wild-type mice. Mice were genotyped at postnatal day ...
