Analysis of the assembly joints of the implemented components
By applying chemical etching, ion milling, and FIB processing to mechanical polishing, we will analyze various metal joints, starting with lead-free solder.
The joints of electronic components have a significant impact on the overall reliability of the circuit board. Particularly at solder joints, it is important to observe not only the shape but also the metal structure.
basic information
■Mechanical polishing of the substrate bonding area + Chemical etching + Ion milling Observation using optical microscope and SEM ■Cross-section creation using FIB Observation using SEM
Price information
We will provide a quote as needed based on the content.
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Applications/Examples of results
- Cross-section of lead-free soldered components observed under an optical microscope - SEM and FIB observation of the joint cross-section * Confirmation of intermetallic compounds at the joint interface * Observation of metal crystal grains
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News about this product（10）
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Cryogenic ion milling cross-section processing example (rubber products)
We will introduce a case where cross-sections were created and observed by method regarding the adhesive parts of the tires of pull-back cars. When conducting SEM observations of the created cross-sections, fillers present inside the rubber were confirmed. It was found that the dispersion state of the fillers and the condition of the adhesive interface were not clear with fracture by liquid nitrogen or mechanical polishing. In contrast, the cross-sections created by cryo ion milling allow for clear observation of the dispersion state of the fillers contained within the rubber and the condition of the adhesive interface with the plastic substrate.
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About the curing temperature of epoxy resin free from hazardous substances.
We conducted measurements to reconfirm the temperature of heat generation during curing, following the change to a non-toxic epoxy resin. When using a large amount of resin, we apply heat generation prevention treatment for resin embedding. Without this treatment, the temperature can rise up to 138°C during curing. However, by applying the heat generation prevention treatment even with a large amount of resin, we were able to keep the heat generation during curing within 30°C.
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Strain measurement of power module package resin.
We would like to present the results of strain measurements conducted by attaching strain gauges and thermometers to the surfaces of power modules, both in the mounted state on a circuit board and in the unmounted state. In the mounted module, a slight delay in temperature change was observed, and correspondingly, the change in strain also appeared to be delayed. This is believed to be due to the slower transfer of heat to the module when it is mounted. At Aites, we conduct temperature cycle tests and temperature-humidity cycle tests, during which we can simultaneously measure the strain occurring in the mounted components. Please feel free to consult with us.
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Evaluation of various implementation substrates
At Aites Co., Ltd., we provide a wide range of technical services for evaluation tests of printed circuit boards (mounted boards) equipped with electronic components. We conduct reliability tests, solder joint observations, whisker observations, and cross-sectional observations. We have IPC-A-610 certified IPC specialists on staff who can assist with observations in accordance with international standards, consultations, and various observation-related concerns. Additionally, we offer services such as X-ray observations, appearance inspections, and shape measurements, so please feel free to consult with us when needed.
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Example of analysis of compounds at the SAC solder and Ni pad interface.
We will introduce an example of the analysis of compounds formed at the interface between Sn-Ag-Cu solder and NiP pads. At the interface of NiP pads and Sn-Ag-Cu solder, compounds such as (Ni,Cu)3Sn4 and (Cu,Ni)6Sn5 grow, and surface analysis using EDX shows the distribution of Ni, Cu, and Sn within these compounds. The EBSD method is a technique that analyzes based on the crystallographic information of the sample. By combining it with elemental analysis using EDX, it is possible to estimate the composition, and in some cases, it may be possible to analyze using crystallographic data for Ni3Sn4 and Cu6Sn5 as substitutes.
