[PDF] Top 20 Temperature and current-density distributions in flip-chip solder joints with Cu traces
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Temperature and current-density distributions in flip-chip solder joints with Cu traces
... shown in Fig. 1b. Constant electric current was applied on only two of the solder bumps through the circuit shown in ...the chip and on the substrate sides were omitted. Dummy ... See full document
7
Effect of bump size on current density and temperature distributions in flip-chip solder joints
... for current density, Q is the activation energy, k is Boltzmann’s constant, and T is the aver- age bump temperature in degrees ...Al and Cu interconnects, but needs to be ... See full document
7
Effect of three-dimensional current and temperature distributions on void formation and propagation in flip-chip solder joints during electromigration
... nucleation and growth and especially the corresponding change of current distribution in the solder joint due to void formation are ...unclear. In particu- lar, it is unknown why ... See full document
4
Thermomigration in flip-chip SnPb solder joints under alternating current stressing
... Electromigration in flip-chip solder joints has attracted a lot of attention in recent years due to the miniaturization trend in high-performance ...the current ... See full document
4
Relieving the current crowding effect in flip-chip solder joints during current stressing
... the current crowding effect in this study was to use a resistive UBM ...layer. In this simulation, we simulated four solder joints with 295, 1477, 2954, and 14770 ⍀ cm, ... See full document
10
Direct measurement of hot-spot temperature in flip-chip solder joints under current stressing using infrared microscopy
... region with a lower local current density but possessed a tempera- ture higher than the hot-spot value described ...located in the right-hand side of the hot spot and close to the ... See full document
7
Nonuniform and Negative Marker Displacements Induced by Current Crowding During Electromigration in Flip-Chip Sn-0.7Cu Solder Joints
... Pb-free solder INTRODUCTION Flip-chip solder joints in future high-performance electronic products may carry electric current den- sities above 1 9 10 4 A/cm 2 ... See full document
6
Failure induced by thermomigration of interstitial Cu in Pb-free flip chip solder joints
... electromigration and thermomigration, the joints were polished laterally and ap- proximately to their centers, as shown in ...Al traces and the Cu lines also decreased ... See full document
4
In-Situ Observation of Material Migration in Flip-Chip Solder Joints under Current Stressing
... PbSn solder INTRODUCTION Electromigration has long been known to cause failures in the interconnect lines of electronic devi- ces, and recently electromigration has also become one of the major ... See full document
6
Thermomigration of Ti in flip-chip solder joints
... Ti in solder joints has not been examined. In this study, void formation was observed in non-current-stressed Al traces during electromigration and thermomigra- ... See full document
4
Influence of Cu column under-bump-metallizations on current crowding and Joule heating effects of electromigration in flip-chip solder joints
... failures in SnAg solder bumps with and without Cu column UBMs have been investigated under a current density of ...SnAg solder bumps with 2 lm Ni UBMs were ... See full document
8
Electromigration and Thermomigration in Pb-Free Flip-Chip Solder Joints
... appear in the Cu 3 Sn layer; most of them are closer to the Cu 3 Sn/Cu interface ...of Cu 3 Sn and the number of voids increase significantly with increasing current ... See full document
28
Measurement of electromigration activation energy in eutectic SnPb and SnAg flip-chip solder joints with Cu and Ni under-bump metallization
... of solder joints can be predicted ...Al traces as a temperature sensor to detect the real temperature in solder bumps during current ...stressing. In ... See full document
7
Temperature-dependent failure mechanism of SnAg solder joints with Cu metallization after current stressing: Experimentation and analysis
... speeds and superior performance, the current den- sity in interconnects continues to increase, and electromigra- tion remains a critical reliability issue for ...1,2 Solder ... See full document
8
Effect of Al-trace dimension on Joule heating and current crowding in flip-chip solder joints under accelerated electromigration
... devices, flip-chip technology has been adopted for high-density packaging due to its excellent electrical charac- teristic and superior heat dissipation ...performance in ... See full document
4
Joule heating effect under accelerated electromigration in flip-chip solder joints
... of solder joints was analyzed. Figure 6 shows temperature distribution on the cross-section along one of the stressed ...the temperature in the Al trace was higher than ... See full document
4
Blocking hillock and whisker growth by intermetallic compound formation in Sn-0.7Cu flip chip solder joints under electromigration
... Electromigration in flip-chip solder joints has become a major reliability issue in recent years because of the minia- turization trend to meet the demand of higher performance ... See full document
5
Mechanism of electromigration-induced failure in flip-chip solder joints with a 10-mu m-thick Cu under-bump metallization
... fast with Cu and the amount of Cu is very limited in the thin-film ...plated Cu UBM has been integrated into the UBM so that the chemical reaction will not consume all the ... See full document
7
Investigation of Void Nucleation and Propagation in the Joule Heating Effect During Electromigration in Flip-Chip Solder Joints
... the current redistributes due to the void ...of current density when the voids deplete ...case in Fig. 3c. Due to the void formation, the current needs to drift farther along the Al pad ... See full document
6
Three-dimensional thermoelectrical simulation in flip-chip solder joints with thick underbump metallizations during accelerated electromigration testing
... average temperature. The temperature in the hot spot is ...The temperature gradient can also be calculated from the temperature distri- ...the temperature difference between the ... See full document
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