Looking inside/through components with x-ray or near-UV?

[Me]

Hi,

I need a source of above-UV or near x-rays that must be able to look
through the black plastic of electronic components. the object is
checking wafer visually, no high resolution is needed, we only want to
know the position of the wafer (GaAS 0.2*0.2 mm) in the device. It is
a precise Hall sensor. It will be used to check many devices.

We don't care if we just have to shine on it on a fotographic filem or
whatever. But we would like to stay as low in the frequency range as
possible, so prefer a little-above-UV to x-rays.

My question, maybe somebody of you already has experience on this
area:
What would be needed to look trhough the plastic of electronic
devices? What generators could be used? Maybe some kind of near x-ray
microscope? What is there at a reasonable price? Any comment is
welcome.

Regards,
Pieter Hoeben
email: [email protected] (remove REMOVETHIS)

 

[newtype]

Hi,

I need a source of above-UV or near x-rays that must be able to look
through the black plastic of electronic components. the object is
checking wafer visually, no high resolution is needed, we only want to
know the position of the wafer (GaAS 0.2*0.2 mm) in the device. It is
a precise Hall sensor. It will be used to check many devices.

We don't care if we just have to shine on it on a fotographic filem or
whatever. But we would like to stay as low in the frequency range as
possible, so prefer a little-above-UV to x-rays.

My question, maybe somebody of you already has experience on this
area:
What would be needed to look trhough the plastic of electronic
devices? What generators could be used? Maybe some kind of near x-ray
microscope? What is there at a reasonable price? Any comment is
welcome.

Regards,
Pieter Hoeben
email: [email protected] (remove REMOVETHIS)

Go to the dentists office and have him x-ray the IC.

 

[William P. N. Smith]

know the position of the wafer (GaAS 0.2*0.2 mm) in the device. It is
a precise Hall sensor.

Why not calibrate the sensor to a known magnet at varying locations?
I'm assumingyou need to know the location of it so you can calibrate
it, but characterizing it maagnetically gets you the same result, if
not a better calibration, doesn't it?

My brain is envisioning a well-characterized magnet in an XYZ
translation stage generating many readings, but you may not want to
get that carried away. 8*)

 

[Al]

Hi,

I need a source of above-UV or near x-rays that must be able to look
through the black plastic of electronic components. the object is
checking wafer visually, no high resolution is needed, we only want to
know the position of the wafer (GaAS 0.2*0.2 mm) in the device. It is
a precise Hall sensor. It will be used to check many devices.

We don't care if we just have to shine on it on a fotographic filem or
whatever. But we would like to stay as low in the frequency range as
possible, so prefer a little-above-UV to x-rays.

My question, maybe somebody of you already has experience on this
area:
What would be needed to look trhough the plastic of electronic
devices? What generators could be used? Maybe some kind of near x-ray
microscope? What is there at a reasonable price? Any comment is
welcome.

Regards,
Pieter Hoeben
email: [email protected] (remove REMOVETHIS)

Use acoustic micro imaging. It will also show up any voids in your
encapsulant. Check out this web site for a provider.

http://www.acoustech-inc.com/

To go to the samples page, try:

http://www.acoustech-inc.com/examples.asp

You can also buy your own machine. You will have to justify the expense
with large quantities of product though.

Al