Exact(4)
ACF 2 gave much better interconnection performance when compared to ACF 1 indicating that ACF 2 is more flexible and can tolerate a wider range of bonding pressure.
ACF 1 is designed to create good interconnection when the connecting bumps and pads are in close contact while ACF 2 can give good connections when the conductive particles are in contact with the bumps and pads, hence the deformation of conductive particles within ACF 2 FCOF packages were less than that within ACF 1 packages.
There are four temporal factors extracted from the autocorrelation function (ACF): (1) sound energy Φ (0); (2) effective duration of ACF, τe; (3) delay time of the first peak, τ1; and (4) its amplitude φ1.
In Fig. 3B we report the pCF-carpet for those sub-regions, calculated at a distance of 0 (corresponding to the ACF), 1, 3, and 5 pixels along the line, by Eq. 3 (Materials and Methods).
Similar(56)
One of the popular statistical properties used in channel characterization is the mean and the ACF [1].
Harmonicity is indicated by high peaks maxτ ACF of the normalized ACF (15).
HMF acts as an initiator as well as a promoter of ACF [28].
A generalization of the ACF is given by the shift ACF [32] that exploits multiple repetitions of the periodic signal.
This property is employed by features that reflect the maximum ACF peak [27], the periodicity of the ACF [29], or the difference between maximum and minimum values [30].
Some methods were proposed to obtain narrow peaks, such as "narrowed" ACF [18] and generalized correlation function [19].
Motivated by Sussman's work [23], similarity constraint forces the sought-after waveform to be close in a certain sense to a desired waveform for reasonable ACF [22].
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