Cytech Systems' Lab：How to Distinguish The Authenticity of IC through Documentation and Packaging Inspection and External Visual Inspection?
IC are one of the indispensable key components in electronic equipment. Their quality and performance directly determine the stability and reliability of electronic equipment. When buying IC chips, many people often encounter a question: How to judge the authenticity of this IC chip? Is it original or refurbished
Documentation and Packaging Inspection and External Visual Inspection take the lead!
For example, Documentation and packaging inspection can verify that the documents, labels, quantities, part numbers, and part types provided at the time of shipment are consistent with the purchase order;
External visual inspection can measure the length, width, thickness and other external dimensions of the material to be tested; it can also check whether the appearance of the IC chip is complete and normal. The appearance of the original IC chip is usually very smooth and uniform, while the refurbished IC chip has undergone welding and other repairs, and the appearance may be rough and uneven;
For another example, it can also be judged by the identification information on the IC chip. The logos on original IC chips are usually relatively standardized and clear, while the logos on counterfeit and shoddy chips may be blurred, deformed, missing, etc.
Now, Cytech Systems Lab shares a case of LUMEX SML-LXF1206SBC-TR.
When the inspection personnel of Cytech Systems Lab first received this batch of materials, they discovered something suspicious about the label：the humidity sensitivity level information on the label provided by the supplier was inconsistent with the specification. The label showed MSL2 and the specification was MSL4.
In the subsequent external visual inspection, the inspectors from Cytech Systems Lab first confirmed the appearance dimensions and the dimensions passed.
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During further external visual inspection, laboratory inspectors once again found that the physical package appearance was inconsistent with the drawings in the specification. For instance, there was a gap in the middle of the physical soldering terminal, but the square pad in the specification had no gap.
Draw conclusion from this, The humidity sensitivity level information on the SML-LXF1206SBC-TR label does not match the specification, and the shape of the sample welding end does not match the drawings in the specification. It is a high-risk material.
More cases
1、Documentation and Packaging Inspection
Case: The incoming label cycle of a certain TI sample does not match the actual product
Sample model:TI LM2736YMKX/NOPB
Sample testing instructions: The label of the incoming material is false, and the cycle on the label does not match the actual product. The cycle on the label is 2235, and the actual product has multiple cycles, making it a high-risk material
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2、External Visual Inspection
Case: External visual inspection of a TI sample revealed coating
Sample model:TI TMS320F28377DPTPT
Sample testing instructions: The coating can be observed from the side of the molded body, indicating that it is a reprinted material. The pins have no cuts or indentations, so it can be determined that this is a refurbished product and defective material.
3、External Visual Inspection
Case: There are regular scratches and coatings on the surface of the molded body of an ADI sample
Sample model:ADI LTC6078IMS8#TRPBF
Sample testing instructions: External Visual Inspection found regular scratches and coatings on the surface of the molded body, indicating that it is a reprinted material. Regular scratches are traces of polishing. The coating is the substance applied to the surface after the material is polished. So, it can be determined that this is defective material.
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