Description: Appearance testing refers to confirming the number of chips received, inner packaging, humidity indication, desiccant requirements and proper outer packaging. Secondly, the appearance inspection of a single chip mainly includes: the typing of the chip, the year, the country of origin, whether it has been re-coated, the state of the pins, whether there are re-polishing traces, unknown residues, and the position of the manufacturer’s logo.


Scope of application: According to relevant testing standards, determine whether the chip is brand new, whether it is refurbished, whether the pins are tinned or oxidized, etc.


Appearance inspection pictures:


Appearance inspection equipment pictures:

Introduction to Appearance Inspection:


Appearance defect detection is a very important part for electronics, precision hardware, printing, plastics and other industries. Both users and manufacturers attach great importance to the appearance defects of products. Therefore, appearance visual inspection has become a very important one ring.


Contents of appearance inspection:


1. The content of the package inspection includes: scratches, stains, damage, underfill, overflow, etc.


2. The content of printing inspection includes: typo, offset, missing printing, multiple printing, blurring, tilting, displacement, hyphenation, double-layer printing, no font, etc.


3. The content of pin detection includes: pin missing, pin damage, pin spacing, pin width, pin bending degree, pin span, pin length difference, pin standing height, pin coplanarity , Pin tilt, etc.


Morphology Observation and Measurement Significance


①The microscopic geometrical

characteristics of the surface of the material affect many of its technical properties and functions to a large extent.


②Observing the surface morphology of the material provides convenience for studying the morphology and structure of the sample, and helps to monitor product quality and improve the process.


Application field


Materials, electronics, lead-free soldering, machining, semiconductor manufacturing, aviation, automobiles, ceramics, geology, medicine, metallurgy, etc.


Test process


Electron microscope observation sample requirements: non-magnetic or weakly magnetic, non-deliquescent and non-volatile solid samples, less than 8CM*8CM*2CM.


Optical microscope observation sample requirements: no special requirements.


Test steps


Confirm the sample type → confirm the inspection specification → observe the sample → record the observation phenomenon/measurement data evaluation → result evaluation