7-1
BGA/CSP Inspection
7
Chapter 7: BGA/CSP Inspection
7-1 Outline
- Inspection procedure
●
Measurement of 6 balls
Image
capture
Binary
conversion
Measure centers
of gravity
Fillet diameters
Object identification
(numbering)
Inspecting BGA/CSP solder balls.
Area of each
object
Ball size
Distance between centers
of gravity for pairs of balls
Distance between balls
Number of balls
Object 0
Object 1
Object 2
Object 3
Object 4
Object 5
Measure the center of gravity, area of each object, number of objects, and fillet
diameter using a color that was emphasized by the color filter function.
Purpose
Example
Application
[Measurement results]
- Number of objects: K
- Area of each object: R0 to R127
- Distance between centers of
gravity:
(DX0, DY0) to (DX127, DY127)
- Fillet diameters: FX, FY