What about calibration. What is the actual smallest object you can measure versus their literature. Resolution.
Victor,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lum Wee Mei
Sent: Friday, January 22, 2010 9:40 PM
To: [log in to unmask]
Subject: Re: [TN] X-Ray Inspection
What are the requirements I should look for when I want to purchase an X-ray machine?
Thanks and Regards,
~ Wee Mei ~
_____
From: TechNet on behalf of stephengregory5849
Sent: Sat 1/23/2010 10:23 AM
To: [log in to unmask]
Subject: Re: [TN] X-Ray Inspection
You will have a "Fish-eye" effect with a lot of x-ray machines. Meaning that
when you are viewing the whole image, the image of the balls in the center
of the screen will appear to be a different diameter than the balls at the
edges of the screen. You should only concentrate on what you see at the
center of the screen, and manipulate and move the BGA around so that you can
see all the balls in the center of the screen.
Steve
----- Original Message -----
From: "Paul Edwards" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, January 22, 2010 8:59 PM
Subject: Re: [TN] X-Ray Inspection
Are you x-raying a BGA with a metal lid?
Paul
Paul Edwards
Surface Art Engineering
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ashok Dhawan
Sent: Friday, January 22, 2010 11:22 AM
To: [log in to unmask]
Subject: Re: [TN] X-Ray Inspection
Bob
We are currently doing XRAY Inspection of BGAs. The XRAY TestEngineer
noticed that solder ball size on outer rows is different from the ball size
on inner core areas.
"We are still seeing a bi-modal data distribution of ball volume between the
middle and periphery balls? Is that normal for BGAs. "
I would appreciate your expert comments as there is not much XRAY related
information on web.
Regards
Ashok Dhawan
Manuf. Specialist
Parker hannifin Electronic Controls
Winnipeg Canada
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