Rework: Replace a QFN IC

RE: Rework: Replace a QFN IC

Jan Cumps — Sat, 17 Dec 2022 15:22:09 GMT

I can't edit this post anymore, but re-uploaded the video that doesn't display at the end of the article:

[View:https://youtu.be/OuGsfiawjoc:640:360]

RE: Rework: Replace a QFN IC

mcb1 — Sun, 13 Mar 2016 03:58:52 GMT

I am presuming you needed to bake these because they were not in a hermetically sealed bag?

One of the more interesting things at element14 Distribution at Leeds was the attention to detail for moisture sensitive parts.

They have their own rebagging area, and the time and dates of delivery are carefully recorded, along with manufacturing batch.

The batch recording is for some customers who want to guarantee the product performs as they have designed and tested.

I presume these people aren't making parts for Rasperry Pi add-ons ....

Mark

RE: Rework: Replace a QFN IC

jw0752 — Sun, 13 Mar 2016 02:41:30 GMT

Hi Jan,

This was a great example of saving a good project by trouble shooting and applying a calculated repair. Thank you for sharing your replacement technique. I enjoyed reading your post.

John

RE: Rework: Replace a QFN IC

mudz — Sat, 12 Mar 2016 13:24:04 GMT

I've definitely skipped this part

I used my microwave/combi oven - in the non-microwave mode - at approx 120° (all temperatures in Celsius) during 4 hours.
And I crossed my fingers.

and used hot air to remove and replace IC. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-c533bdb9-4ecb-4fbc-affe-f5be84d020c5/contentimage_5F00_1.png:16:16]

I wonder how much power is wasted in heating that for 120c for 4 hours.

Thanks for sharing [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-c533bdb9-4ecb-4fbc-affe-f5be84d020c5/contentimage_5F00_1.png:16:16]

mudz