+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: General Forum (/forum-4.html)
+--- Thread: Die shots of all integrated circuits of an Hp41c (/thread-10361.html)
Pages: 1 2
Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 04:29 AM
Hi, my name is Pablo and I have an Hp41c calculator in my small collection that had a dead logic board. So I decided to decap and expose the die of every IC chip in the calculator and I want to share the photos with you, I know some of you will be interested. I don't know how to post the photos on this forum I will try, but you can see them in my twitter acount @walls_pablo.
Pablo Walls
RE: Die shots of all integrated circuits of an Hp41c - Alejandro Paz(Germany) - 03-21-2018 05:39 AM
Hei Pablo,
you can post links to photos hosted somewhere else. If your intention is to have photos that can be used to reverse-engineer the parts, well they will be quite large and cannot be hosted here anyways. (Use the small button on the toolbar of the editor with what looks like a red sun and a blue mountain, it has the caption "insert image").
For small photos use the button "Choose File" on the lower left corner of the "Attachmet" block.
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 10:39 AM
Thank you Alejandro for your reply, now I know why I could not attach any photo.
Pablo walls
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:15 PM
Die shot from a DC-DC converter from a Hp-41C calculator, part number 1826-0953-1.
![[Image: DYQF5xNUMAAKm5x.jpg]](https://pbs.twimg.com/media/DYQF5xNUMAAKm5x.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:17 PM
![[Image: DYQGWyCU0AENvBu.jpg]](https://pbs.twimg.com/media/DYQGWyCU0AENvBu.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:18 PM
![[Image: DYQGX0mUQAYp1jX.jpg]](https://pbs.twimg.com/media/DYQGX0mUQAYp1jX.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:20 PM
Inside the hp41c calculator, this time was able to decap and expose the die of one of the RAM chip's (ILE701) and one of the ROM's (ILE908), next time I will try to decap the display drivers.
![[Image: DYrGH1ZVMAAHa99.jpg]](https://pbs.twimg.com/media/DYrGH1ZVMAAHa99.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:21 PM
RAM chip's (ILE701)
![[Image: DYrGiQiVMAAarat.jpg]](https://pbs.twimg.com/media/DYrGiQiVMAAarat.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:23 PM
The ILE908 ROM from the Hp41c.
![[Image: DYrHVCQV4AA9ibG.jpg]](https://pbs.twimg.com/media/DYrHVCQV4AA9ibG.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:24 PM
![[Image: DYrHWsTUQAAkZQC.jpg]](https://pbs.twimg.com/media/DYrHWsTUQAAkZQC.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:29 PM
The CPU from the Hp41c.
![[Image: DYrILpbVQAAtNhO.jpg]](https://pbs.twimg.com/media/DYrILpbVQAAtNhO.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:32 PM
Finally, I was able to decap and expose the die of one of the display driver's of the Hp41c calculator.
![[Image: DYriTOPUQAAe0iy.jpg]](https://pbs.twimg.com/media/DYriTOPUQAAe0iy.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:34 PM
![[Image: DYriXaDUMAI41LR.jpg]](https://pbs.twimg.com/media/DYriXaDUMAI41LR.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:36 PM
![[Image: DYriZM4U0AAA1e5.jpg]](https://pbs.twimg.com/media/DYriZM4U0AAA1e5.jpg)
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 02:42 PM
I was surprise to find out that the display drivers look to be more complex than the CPU.
![[Image: DYri3ClUQAAqrWr.jpg]](https://pbs.twimg.com/media/DYri3ClUQAAqrWr.jpg)
RE: Die shots of all integrated circuits of an Hp41c - damaltor - 03-21-2018 02:45 PM
This is sad for the calclulator but the photos still are beautiful.
RE: Die shots of all integrated circuits of an Hp41c - Paul Berger (Canada) - 03-21-2018 03:10 PM
(03-21-2018 02:15 PM)pablowalls Wrote: Die shot from a DC-DC converter from a Hp-41C calculator, part number 1826-0953-1.
Very nice, what equipment did you use to take the die shots? I have taken die shots before using bellows with a reversed lens and also using microscope objectives adapted to my camera.
Paul.
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 08:57 PM
Hi Paul, I did not use any special adapter, just my cell phone over the objective lens of the microscope.
Pablo Walls
RE: Die shots of all integrated circuits of an Hp41c - pablowalls - 03-21-2018 09:15 PM
(03-21-2018 02:45 PM)damaltor Wrote: This is sad for the calclulator but the photos still are beautiful.
Damaltor, this calculator was beyond repair and I thought it would be interesting to see inside the chips that make this calculator tick, I did the same with an Hp25 but was the first one I try to Decap with very bad results. I have an Hp67 with a bad ACT chip and I will try to decap and hope this time I get it right.
(No live HP calculators were harmed in the making of this post, they were already dead.)
RE: Die shots of all integrated circuits of an Hp41c - rprosperi - 03-21-2018 11:31 PM
Very cool, thanks for sharing these.
Also, thanks for your policy of not harming working machines.