How to test Surface Mount Technology(SMT) quality with scanning acoustic microscope
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author：admin
source：Hiwave
time：2025-01-13
catogory：Industry News
What is Surface Mount Technology(SMT)
SMT (Surface Mount Technology) is an electronic assembly technique that allows el……
SMT (Surface Mount Technology) is an electronic assembly technique that allows electronic components to be mounted directly onto the surface of a printed circuit board (PCB), as opposed to the traditional through-hole technology where component leads are inserted into holes drilled in the PCB. SMT has become one of the most commonly used technologies in modern electronics manufacturing due to its numerous advantages, which include higher assembly density, smaller form factors, improved high-frequency performance, and the capability for automated production.
What is scanning acoustic microscope?
A Scanning Acoustic Microscope (SAM) is a non-destructive testing tool that utilizes high-frequency ultrasound to examine the internal structures of materials or components. This technology is capable of detecting various defects such as cracks, delamination, voids, and interface debonding, especially those issues that cannot be identified through optical or other surface inspection methods.
Working Principle of Scanning Acoustic Microscope
Ultrasonic Wave Emission
In Scanning Acoustic Microscopy (SAM), a transducer acts as both the emitter and receiver. It generates high-frequency ultrasonic pulses that are transmitted to the sample surface through a coupling medium like water or oil.
Reflection and Transmission
When ultrasonic waves encounter an interface between two different materials:
Partial Reflection: Some energy is reflected back.
Partial Transmission: The remaining energy continues into the next material layer. The amount of reflection depends on the acoustic impedance difference between the materials; greater differences lead to stronger reflections.
Signal Capture and Processing
The reflected ultrasonic waves are captured by the transducer and converted into electrical signals. A computer system then analyzes these signals.
Hiwave: Leading Scanning Acoustic Microscope Supplier in China
Founded in 2012, Shanghai Hiwave Precision Instruments Co., Ltd. specializes in the low-voltage electrical industry, focusing on the design, research and development, system integration, sales, and technical services of advanced equipment. The company provides ultrasonic non-destructive testing instruments for the low-voltage electrical field and offers comprehensive welding quality system solutions to our clients.
