Adafruit will not be shipping orders Thanksgiving Day, Thursday November 22, 2018. Expedited orders placed after 11am ET Wednesday November 21 will go out Friday November 23.
0

How do you Test a BGA?

If you’ve ever wondered why people tend to avoid BGA, it isn’t only the cost associated with multi-layer PCBs, it’s also because it’s impossible to inspect them after they have been soldered to way you would a QFP chip for solder bridges, etc.  The solution in any professional production line is simple … they all get scanned with a specialised XRAY machine.  The image above is from a board I had reworked, and wanted to make sure everything was OK underneath since I only had one sample.  I thought the results were worth sharing.  The solid black boxes underneath are capacitors on the bottom side of the board directly beneath the BGA chip.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,700+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Spotlight on Makeblock, one of the latest companies to find success in the STEAM market

Wearables — Emphasize the light

Electronics — Avoid serial confusion!

Biohacking — BDNF a Biohackers Best Friend

Python for Microcontrollers — Python powers costumes, and community @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



1 Comment

  1. I’ve noticed in your image and other boards I’ve seen inspected how opaque to X-rays some capacitors can be. Also, it is humbling to see how big the vias are. In layout programs, vias just seem a quick jump to the next layer, but that layer can be 2 to 30 or more mils away.

Sorry, the comment form is closed at this time.