External Visual Inspection
External visual inspection is a process of verifying the attributes of parts such as components condition, part markings, evidence of a secondary coating, lead conditions, dimensions and surface quality. Visual inspection is performed per SAE AS5553 and MIL-STD-883 Method 2009.9 and on a sample of parts from a given lot base on the sample according to the ANSI ASQE Z1.4 Table II−A.
Visual Inspection is a term used for inspecting electronic components under a microscope to determine if a device has been altered from its original state. During this process a device may show signs of non conformance or inconsistencies that help determine if a device has been used or if a device is new and original. This process is normally performed by a Components Test Lab or Test House for short. This process is a non-destructive and devices can be used afterwards. There are so many things to look for during a visual inspection. Below are some of the things generally looked for during a visual inspection of IC Devices.
Device Markings
Inconsistently Printed Device Markings
Double Printed Markings
Marking Placement
Ghost Markings
Marking Alignment
Font Inconsistently Printed
Marking Splatter
Marking Orientation
Laser Burns
Pin Indicator - COO
Texture of Pin Indicator
Position of Pin Indicator Comparison
Foreign Object Debris Inside Pin
Secondary Coating Inside Pin Indicator
Different Country of Origin
Pin Size and Depth Comparison
Body Inspection
Sanding Marks
Secondary Coating
Pull Marks
Tool Marks
Flaking
Scratches
Molding Texture
Foreign or Displaced Material
Contamination
Mold Mark
Mold Flash
Corrosion
Cracks
Chips
Over spray
Inconsistent Textures
Voids
Solder Mask
Solder Mask Damage
Foreign or Displaced Material
Residue on Soldermask
Soldermask Scratches
Bga Condition
Solder Mask Damage
Foreign or Displaced Material
Residue on Soldermask
Soldermask Scratches
Package Condition
Physical Dimensions
Package Construction
Construction Defects
Lead Condition
Oxidation
Re-Tinned
Straightened
Refurbished
Bent Leads
Tool Marks
Lead Plating Quality
Lead Alignment
Lead Formation
Scratches on Leads
Scoring
Voids
Plating Composition
Physical Dimensions
Residue
Distorted
Corrosion
Chips in Leads
Excess Solder Material
Exposure to High Temperatures