Chip Image in QFN Package

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mawyatt
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Chip Image in QFN Package

Post by mawyatt »

Here's an old test chip (Direct Digital to Antenna chip) in a QFN package done in IBM 9HP (90nm SiGe BiCMOS). The WeMacro Controller, 4X Inf. 0.1NA, THK KR20 modified rail and Nikon 200mm F4 "Q" tube lens with D800E camera were used. Lighting came from 4 Adorama studio 300AC strobes with foam diffusers and subject was inside a white foam cup on base of a WeMacro Vertical Stand attached to a Ball Head with a pin glued to the QFN backside (removed in post).

A total of 157 images (50um steps) were collected at processed with Zerene.

Best,

Mike

Image

Saul
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Post by Saul »

Impressive. Like very much that black - gold contrast. Any chance to see high res photo ?
Saul
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mawyatt
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Post by mawyatt »

Saul,

Thanks. It posted here on DPReview. The TIFFs are too big, so this is just the JPEG.

https://www.dpreview.com/forums/post/60364643

BTW I have another taken with the Wemacro 5X 0.15NA PLAN APO Long Working Distance with same setup. I didn't want to clog up things with it though.

Best,

Mike

Saul
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Post by Saul »

Mike,
Very nice, well controlled light and perfect details.
Next step - stereo version :wink:
Saul
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mawyatt
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Post by mawyatt »

Saul,

Thanks.

Sorry I don't know how to do or even view stereo :(

I use a Mac, so the software to do this may not be the same or available.

Best,

Mike

Harald
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Post by Harald »

Hi there Mike,
Just got to love this :D
Great light and details. I think it´s a jewel...

Thanks for sharing
Kind Regards
Harald

Lier Fotoklubb / NSFF
AFIAP / CPS
BGF / GMV
http://www.500px.com/blender11

mawyatt
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Location: Clearwater

Post by mawyatt »

Harald,

You are welcome sir!!

It is a special "jewel" to me in more ways that one. I have a patent (actually 2) on the circuit, and get a nice picture too :D

Best,

Mike

Saul
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Post by Saul »

mawyatt wrote:...Sorry I don't know how to do or even view stereo :(
I use a Mac, so the software to do this may not be the same or available...
https://zerenesystems.com/cms/stacker/d ... eticstereo
Saul
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mawyatt
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Post by mawyatt »

Harald wrote:Hi there Mike,
Just got to love this :D
Great light and details. I think it´s a jewel...

Thanks for sharing
I should mention the lighting is tricky, I guess all our macro lighting is tricky but these chips are particularly difficult for me.

I've found over lots of time and experiments that multiple light sources (studio strobes) surrounding the subject chip and highly diffused multiple times works the best.

White styrofoam cups work extremely well, but really eat up the light. So you need strong sources. Thin white foam packing material works well on the strobes, but watch out for the incandescent modeling bulbs in studio strobes they will melt the foam if you allow it to touch the bulb or get very near. Don't ask how I know this :oops:

Best,

Mike

mawyatt
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Location: Clearwater

Post by mawyatt »

Saul wrote:
mawyatt wrote:...Sorry I don't know how to do or even view stereo :(
I use a Mac, so the software to do this may not be the same or available...
https://zerenesystems.com/cms/stacker/d ... eticstereo
OK, looks as if I have a homework assignment :roll:

mawyatt
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Joined: Thu Aug 22, 2013 6:54 pm
Location: Clearwater

Post by mawyatt »

Saul wrote:
mawyatt wrote:...Sorry I don't know how to do or even view stereo :(
I use a Mac, so the software to do this may not be the same or available...
https://zerenesystems.com/cms/stacker/d ... eticstereo
Saul,

I completed a stereo processing with Zerene per shown instructions with 9 section images. I used PS to render a Timeline View of such, after fiddling with things (1st time at this).

This worked eventually and I have a monster file (306MB) in PSD format. All of this took an enormous amount of work, Zerene ran forever on the 9 sets of 157 stacked images with the original massive D800E TIFF files, but produced the results. However I did save the 9 resultant images in JPEG.

After a bunch of editing in LR and PS, it's pretty neat to watch the perspective view change as the image rotates, you can even dive down into the QFN cavity.

I've made some high resolution files, but these are much to big for posting here. Here's the GIF rendered with auto color and only 850 pixels horizontal to fit within 300K file size limit.

Here's a higher resolution version on DPReview.

https://4.img-dpreview.com/files/p/E~fo ... 1c589028fa

https://www.dpreview.com/forums/post/60369170

Best,

Mike

Image
Last edited by mawyatt on Tue Jan 02, 2018 10:54 am, edited 1 time in total.

JH
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Post by JH »

Great picture and nice gif.
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo

ChrisR
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Post by ChrisR »

Wow, impressive work. :smt038

(Though my class of 13 year olds will probably ask "Is there an App for that? ")

What frequency RF is possible from a chip like this, by the way?
Chris R

Saul
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Post by Saul »

mawyatt wrote:...All of this took an enormous amount of work, Zerene ran forever ...
Mike,

What I can see from the your result - it was worth efforts !
Impressive !
I'm always resizing photos for stereo - Zerene runs much more faster . Of course, it will be problem with post-processing and final look, but ...

Now, new assignment - cross eyed stereo :wink:
Saul
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mawyatt
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Joined: Thu Aug 22, 2013 6:54 pm
Location: Clearwater

Post by mawyatt »

Saul wrote:
mawyatt wrote:...All of this took an enormous amount of work, Zerene ran forever ...
Mike,

What I can see from the your result - it was worth efforts !
Impressive !
I'm always resizing photos for stereo - Zerene runs much more faster . Of course, it will be problem with post-processing and final look, but ...

Now, new assignment - cross eyed stereo :wink:
OK I give, what's that!! :roll:

Cheers,

Mike

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