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Bonding wires can survive plasma

A project log for Integrated Circuit decapping without acid

IC are amazing, but always closed in eopch which seems impossible to remove. Here we propose a method to decap without acids

100dollarhacker100dollarhacker 01/03/2024 at 07:090 Comments

I thought I should start from the point I know it's working. So I used a thick copper wire to connect my SMD transistor and manually tried to decap it. I started etching and after a while I got my first SMD decaped transistor.

It's looks great isn't it?

But what about bonding wires? Can we save them?

The answer is yes, so it appears at least. Second transistor I was ready and with a lot of patience I made etching with bonding wires present.

After few hours af gentle decapsulation I got those two binding wires intact.

Clumsy me, one wrong move and one of the bonding wires turned to micro scrambled egg.

I don't give up yet ... I have a better idea... Stay tuned ... 

Instead of holding pliers I made this 

Just a simple pliers holder. Now we can set plasma flame to right position. We got:

And the preliminary result after 10 minutes of etching 

After some trials

Even more wire exposed. I am doing it baby steps. I don't want to fry anything.

Here some pics

After even more baby steps I got this 

The cube have the transistor we saw earlier. 

I don't know how to get rid of the residual on the cube. I've tried ultrasound bath but lost the cube. 


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