0

Using Heat Shock to Open an IC Package

John McMaster writes:

Many people use concentrated acids to decapsulate ICs. One alternative is to heat them up to a high temperature and then drop them to a low temperature quickly. The high temperature was supplied by a butane torch and the cold temperature from a salted ice water bath. From the brief experiments I did today, the ideal chip seems to be large, have a metal plate (large expansion constant difference), and have a passivation layer that expands under heat (pushes epoxy off of die). This chip has all three and was decapsulated in less than a minute. It does have some small amount of residue on it, but chips can be cleaned in various ways.

Cool!


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 12,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

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 — SiFive is a startup to pay attention to. RISC-5 is here to stay.

Wearables — Swatch it up

Electronics — Code like everyone’s watching

Biohacking — Stroboscopic Visual Training

Python for Microcontrollers — CircuitPython takes flight! All aboard with datum, Bluefruit CPX, and more! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit

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



2 Comments

  1. Note to budding photog/videographers:

    Avoid having a light source behind the subject. It will be impossible to decipher any details of what you’re trying to demonstrate. Arrange it so the the light source is at least nearly behind the camera.

  2. Very good, ’twas qite awsome.

Sorry, the comment form is closed at this time.