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 picture:
Appearance inspection equipment pictures:
Introduction to Appearance Inspection: Appearance defect inspection 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 part.
The content of appearance inspection:
1. The contents of package inspection include: 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, pin span, pin length difference, pin standing height, pin coplanarity , Pin tilt, etc.
Significance of morphology observation and measurement:
1. Sample requirements: Electron microscope observation sample requirements: non-magnetic or weakly magnetic, non-deliquescent and non-volatile solid samples, less than 8CM*8CM*2CM.
2. Optical microscope observation sample requirements: no special requirements.
Test steps: Confirm the sample type→confirm the inspection specification→observe the sample→record observation phenomenon/measurement data evaluation→result evaluation
