Signed Logic PCB

[Ignazio Cara (Italy)]

Have you never seen a classic series logic PCB signed with 'PCM' near the 1820-1189 ROM? Look at the picture linked at:

HP_70_logic_PCB

Regards from Italy

Ignazio

[Randy]

I've seen initials and other notations on most classics, especially those with ceramic packages.

Most pre-1990'ish Voyagers have initials of the final assembler under one of the foot pads.

[Ignazio Cara (Italy)]

Thanks Randy.

Regards

Ignazio

[Frank Boehm (Germany)]

this is a manufacturer mark, added to the finalized layout by the PCB manufacturer (so you could track down faulty parts); it's nothing personal :)

[DaveJ]

Quote:

---

this is a manufacturer mark, added to the finalized layout by the PCB manufacturer (so you could track down faulty parts); it's nothing personal :)

---

It's either a PCB manufacturers mark, or a "signature" of the board designer. If it's not on all boards, then most likely a manufacturer mark.

But I've had cases where my own "signature" on my boards have been eye-balled by management and removed in subsequent runs. At my current company we aren't allowed to add signatures to our
works of art :-(

Dave.

Edited: 18 Mar 2009, 5:58 a.m.