[SI-LIST] Re: IC package

  • From: Riaz Sobrany <r.sobrany@xxxxxxxxxxxxxxxx>
  • To: Sandor Daranyi <sandord@xxxxxxxxxxxxx>
  • Date: Wed, 18 Aug 2004 01:02:34 +0100 (BST)

On Wed, 18 Aug 2004, Sandor Daranyi wrote:

> > At 05:11 PM 8/17/2004 +0530, s.raja wrote:
> > >why all IC packages are Black in colour?.
> > >Regards
> > >Raja
> Although non-black packages are definitely in the minority, there are some =
> examples - a few have already been mentioned.  Other contemporary example=
> s are some AMD processors...
> http://www.pacs-portal.co.uk/Computers/images/athlon.jpg
> http://www.amd.com/us-en/assets/content_type/DigitalMedia/26027A-13.jpg
> ...although, they are not the ubiquitous, fully encapsulated types.
> Furthermore, I recall that back in the 70's and 80's, there were TTL logic =
> chips made in the USSR that were packaged in greenish, brownish (khaki?) =
> material.  (They also had the "distinction" of being DIP packages with EX=
> ACTLY 2.5mm pin pitch.  Because of this, they were mostly known to Easter=
> n Block countries only.)  The colour of the package surface was a bit une=
> ven, which almost lent a kind of texture to it.  So, in electronics circl=
> es, it was nick-named as the "elephant dung packaging".

I have occasionally encountered white and yellow ICs in ceramic packages.

The reason why IC packages are normally matt black is because they radiate
heat more effectively than any other colour.
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