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Flip-chip sound time frequency domain and time domain imaging method based on OpenMP

A technology of time-domain imaging and flip-chip welding, which is applied to multi-programming devices, solids using sound waves/ultrasonic waves/infrasonic waves, processor architecture/configuration, etc., and can solve problems such as real-time constraints and the impact of flip-chip welding chip analysis , to achieve the effects of improving efficiency, realizing convenience, and improving imaging efficiency

Active Publication Date: 2021-08-13
XIAN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0003]In the current study, MPAMI is used to reconstruct the signal of flip-chip bonded (FCB) chips, and the reconstructed signal is imaged at the same time, but the real-time The performance is restricted, and with the continuous increase of resolution, the efficiency of traditional MPAMI has plummeted, which has affected the analysis of internal defects of flip-chip chips.

Method used

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  • Flip-chip sound time frequency domain and time domain imaging method based on OpenMP
  • Flip-chip sound time frequency domain and time domain imaging method based on OpenMP
  • Flip-chip sound time frequency domain and time domain imaging method based on OpenMP

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Embodiment Construction

[0064] Such as figure 1 Shown is a flip-chip acoustic time-frequency domain and time-domain imaging method based on OpenMP, the method comprises the following steps:

[0065] Step 1. Acquisition of ultrasonic scanning data:

[0066]Step 101, taking the upper left corner of the surface of the flip-chip as the origin, passing the origin and along the long side of the flip-chip as the X-axis direction, passing the origin and along the wide side of the flip-chip as the Y-axis direction, and establishing rectangular coordinates system; wherein, the X-axis and the Y-axis are vertical;

[0067] Step 102, setting the surface of the flip-chip to divide into multiple scanning areas, and the total number of scanning areas is N x ×N y ; where N x Indicates the number of columns of scanning areas formed along the X-axis direction, N y Indicates the number of rows of the scanning area formed along the Y-axis direction, the center position of each scanning area is recorded as the scanni...

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Abstract

The invention discloses a flip chip sound time frequency domain and time domain imaging method based on OpenMP. The method comprises the following steps: 1, obtaining ultrasonic scanning data; 2, storing and selecting ultrasonic scanning data; 3, selecting an over-complete dictionary; 4, performing time-frequency domain imaging of ultrasonic A scanning signals; and 5, performing time domain imaging of the ultrasonic wave A scanning signal. The method is simple and reasonable in design, so that sound time frequency domain and time domain imaging is carried out under a parallel architecture, the method adapts to the increase of the length of an ultrasonic A scanning signal, the imaging efficiency is effectively improved, and the practicability is high.

Description

technical field [0001] The invention belongs to the field of imaging technology, in particular to an OpenMP-based flip-chip acoustic time-frequency domain and time-domain imaging method. Background technique [0002] As advanced microelectronic packages are made smaller and thinner, inspection of features and defects inside microelectronic packages is approaching the resolution limit of time-domain imaging (TAMI). Frequency Domain Imaging (FAMI) is a method proposed by Semmens and Kessler to generate single-frequency Fast Fourier Transform (FFT) filtered images. Although FAMI reveals some features or defects that are at or below the acceptable resolution limit in TAMI, some important features may be missing or cannot be resolved in a single frequency image due to spectral overlap and frequency offset. A high-resolution imaging (MPAMI) technology based on matching pursuit (Matching Pursuit, MP) solves the above-mentioned problems of acoustic time-domain and frequency-domain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/50G06T1/20G01N29/04
CPCG06F9/5027G06T1/20G01N29/04G01N2291/023G01N2291/0289
Inventor 齐爱玲张广明王嘉森
Owner XIAN UNIV OF SCI & TECH
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