[sdiy] part identification

[Magnus Danielson]

From: sasami at hotkey.net.au (Ken Stone)
Subject: [sdiy] part identification
Date: Tue, 30 Apr 2002 18:20:32 +1000 (EST)

> Hi all,  I've found another weird part I'm trying to identify. It has the
> following written on it : HAFO  R 35101 40699
> It looks more or less like a BC107, except that it has 4 leads, is gold
> plated, and has a domed top.
> 
> Checking with a multimeter didn't reveal a lot.

HAFO rings a nice little bell.... Asea Hafo (ABB Hafo due to the Asea
and Brown-Boveri merger), a Swedish semiconductor manufacturer (now
bought by MITEL from the ABB). They did a lot of fiber optic
components, so if your dome is transparent, you've probably got
yourself a laser-diode (with a sense PIN-diode). I don't have any
datasheets or anything.

Asea Hafo had among other things a 2um CMOS SOS process where they did
stuff for the space industry among other things.

I think I recall that Hafo stood for Halvledar Forskning (Swedish for
Semiconductor Research).

I am sure others can fill in...

Cheers,
Magnus