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Ticket #1707556

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Keytronic, Oakdale MN - X-Ray VT-X750 inspection image help

CustomerNot indexed
CompanyNot indexed
Priority2
TypeAOI - No Action Required
UpdatedApr 20, 2026 at 8:26 AM
Thread16 messages
Ticket metadata
Group
AOI US (150000419797)
Status
Closed (5)
Created
Feb 24, 2026 at 1:50 PM
Requester
Not indexed
Company
Not indexed
Last synced
Aug 2, 2026 at 10:53 PM
Resolved
Mar 10, 2026 at 11:39 AM
Closed
Mar 18, 2026 at 3:24 PM
Tags
A - AOI CASE ACK EN, A - Reply Open, A - 1 Hour Delay rslv, A-REOPEN, LOCKED, NEW from LOCKED

Current case

Customer issue

Hello, Reaching out for help with interpreting the x-ray inspection image on a LGA. We are noticing some clear voids in the solder balls and some grey areas. Trying to determine if we should treat it as a void, minimal change in the grey areas after a second reflow. X-ray images attached. Tamas Fodor Process Engineer office: [phone] fax: [phone] cell: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com This e-mail message may contain confidential or legally privileged information and is intended only for the use of the intended recipient(s). Any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is prohibited. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, or contain viruses. Anyone who communicates with us by e-mail is deemed to have accepted these risks. Key Tronic Corporation is not responsible for errors or omissions in this message and denies any responsibility for any damage arising from the use of e-mail. Any opinion and other statement contained in this message and any attachment are solely those of the author and do not necessarily represent those of the company.

Conversation

Engineer and customer thread

16 messages
  1. Omron Application Engineer Omron reply | Feb 24, 2026 at 7:52 PM
    Hello Tamas, agree with you—there is only a minimal difference between Reflow 1 and Reflow 2. To determine whether the void percentage is correct, you’ll need to open the program in Teaching Mode and verify that the software is highlighting the voids in red, as shown in the image. If any voids are missing, adjust the Bin. Thr. accordingly. ​ ​ Francisco Villalpando Engineering Supervisor Direct: +[phone] [email]
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  2. Customer Customer reply | Feb 26, 2026 at 9:31 AM
    Good morning, We are still waiting for a response on this questions, please advise. Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________

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  3. Omron Application Engineer Omron reply | Feb 26, 2026 at 9:37 AM
    Hello Tamas, I replied to your email 2 dasy ago. See below my response Hello Tamas, agree with you—there is only a minimal difference between Reflow 1 and Reflow 2. To determine whether the void percentage is correct, you’ll need to open the program in Teaching Mode and verify that the software is highlighting the voids in red, as shown in the image. If any voids are missing, adjust the Bin. Thr. accordingly. Francisco Villalpando Engineering Supervisor Direct: +[phone] [email]
  4. Customer Customer reply | Feb 26, 2026 at 9:46 AM
    Hello Francisco, The voids are highlighted correctly on the ground pad. Voids in the balls are a mix in the grey area, some get highlighted and some don't. My guess is it is flux trapped in the ball and there is some solder particles in it but I would like an expert to confirm what we are looking at. Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________

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  5. Customer Customer reply | Feb 26, 2026 at 10:50 AM
    Francisco, Here is an image showing the binarization difference in the balls with grey voids: [cid:a4ff71ab-929c-47c1-9f9d-1d03fb2a4601] [cid:4adb0215-8bd3-4c0b-bddd-99dd04324c49] Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________
  6. Omron Application Engineer Omron reply | Feb 26, 2026 at 11:34 AM
    Hello Tamas, The grey portion of the BGA “style” solder joints are not voids, only the black spots in the image are voids. The outer shell of BGA balls tend to be brighter on larger size balls and darker in middle. If you have smaller ones they generally show up as solid white. Just adjust binarization and test with void ratio overlay to verify.
  7. Customer Customer reply | Feb 26, 2026 at 11:49 AM
    Francisco, We are using the same part and same PCB on the previous build revision and there is a noticeable difference in the grey areas, it doesn't look like solder to me. Old build x-ray sample: [cid:8415df2a-ffd5-4d7a-8bc2-05103bb16e05] Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________
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  8. Customer Customer reply | Mar 3, 2026 at 9:05 AM
    Good morning, Francisco I was waiting on a response for the comparison x-ray image, my initial statement was incorrect about using the same PCB. The LGA PCB footprint, solder paste and oven profile is the same. We will not treat grey areas in solder balls as voids, thank you for your help. Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________

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  9. Omron Application Engineer Omron reply | Mar 3, 2026 at 10:59 AM
    Hello Tamas, Gray areas from the previous screenshot should not be considered voids, please adjust Bin Thr in case software is caching it as void. Based on the screenshot you sent, it looks like the issue is different. The ball highlighted in red appears to have a defect, it has a very small connection area and is close to being a HiP. Francisco Villalpando Engineering Supervisor Direct: +[phone] [email]
  10. Omron internal Private note | Mar 10, 2026 at 11:24 AM
    Private
    Subject: RE: Keytronic, Oakdale MN - X-Ray VT-X750 inspection image help [ AOI Case# 1707556] has been resolved. Description: Hello Tamas, Thank you for your recent inquiry. We’re pleased to inform you that your case 1707556 has been resolved. As always, we're here to support you. If you need assistance in the future, please don’t hesitate to reach out to us via our support email: [email] If you believe further support is needed regarding this case, simply reply to this message with a brief status update, and we’ll be happy to assist you. Francisco Javier Villalpando Your Omron AOI Technical Support Group
  11. Customer Customer reply | Mar 10, 2026 at 11:29 AM
    Hello, Case# 1707556 has not been resolved, I did not receive a response to my last reply. I will check my spam email folder in case the response was blocked suddenly. This is the second time I am missing a communication email from OMRON support. Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________
  12. Omron Application Engineer Omron reply | Mar 10, 2026 at 11:33 AM
    Hello Tamas, No worries. I resolved the ticket, but please let me know if you were able to see the email. I will forward it separately so you can review. Thank you for letting us know!
  13. Omron Application Engineer Omron reply | Mar 10, 2026 at 11:34 AM
    Hello Tamas, Here is what Francisco last said:
  14. Customer Customer reply | Mar 10, 2026 at 11:38 AM
    Hi, Apologies, I referred to the wrong case number. Waiting on response for ticket #1716548. Case #1707556 was indeed answered, thank you for the help! Tamas Fodor Process Engineer office: [phone] fax: [phone] mobile: [phone] [email] [cid:key_logo_c80cbb82-b1fc-48a0-b5af-018192461caa.png] 7015 55th Street North Oakdale, MN 55128 keytronic.com ________________________________
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  15. Omron internal Private note | Mar 10, 2026 at 12:25 PM
    Private
    Subject: RE: Keytronic, Oakdale MN - X-Ray VT-X750 inspection image help [ AOI Case# 1707556] has been resolved. Description: Hello Tamas, Thank you for your recent inquiry. We’re pleased to inform you that your case 1707556 has been resolved. As always, we're here to support you. If you need assistance in the future, please don’t hesitate to reach out to us via our support email: [email] If you believe further support is needed regarding this case, simply reply to this message with a brief status update, and we’ll be happy to assist you. Francisco Javier Villalpando Your Omron AOI Technical Support Group
  16. Customer Customer reply | Apr 20, 2026 at 8:26 AM
    Good morning, I have a BGA with a similar inspection result that I passed acceptable; test failure was the ball is an 'open' connection. Based on the previous information, this was not a defect. Please advise if we are interpreting the grey areas in the x-ray inspection correctly. [cid:9355ab9f-f5a5-43dd-a233-6d06e03c9c1e] [cid:2d97c28c-a277-4ca1-89f3-b3fbf03d5e9d] Tamas Fodor Process Engineer office: [phone] [cid:keylogo_208x50_0ac9ea0f-7f9d-4ec3-a3c7-8bb6a21f2376.png] [cid:badge_ps_25_e44ba8f1-1394-4cd2-bc08-c4fc88dbb807.png] fax: [phone] 7015 55th Street North cell: [phone] Oakdale, MN 55128 [email] keytronic.com ________________________________