Rick,

The use of x-ray depends on what you are doing.
Rework ususally has 100% x-ray inspection.
Prototype usually has 100% x-ray inspection
Production can have 100% x-ray (especially if someone is paying for 5DX
inspection) or a sampling of first boards and shift change product.

X-ray finds bridges or possibly missing solder balls but cannot dependably
find "opens". Side viewing limited  to the number of rows it can see down
but can possible find cracks, opens, etc without destructive testing.
Usually research rather than straight production wants this type of
equipment.

So, what is your business and what is the nature of your BGA inspection?

Dorothy Lush

> ----------
> From:         Rick Howieson[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Rick Howieson
> Sent:         Thursday, June 28, 2001 10:36 AM
> To:   [log in to unmask]
> Subject:      BGA
>
> For the folks out there doing BGA assembly, do you use x-ray for
> inspection
> and if so, how often. I'm curious whether we need to purchase x-ray or a
> scope that allows side viewing.
> Thanks,
> Rick Howieson
> Delta Group Electronics, Inc.
>
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