[SI-LIST] Re: IC package
- From: Geoff Stokes <gstokes@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 23 Aug 2004 14:12:47 +0100
The real reason is that chips are very light-sensitive. Any coloured
plastic is slightly transparent, so only black (or very dark) will do.
> -----Original Message-----
> From: Sol Tatlow [mailto:Sol.Tatlow@xxxxxxxxxxxxxxx]
> Sent: 17 August 2004 15:10
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: IC package
>
>
> Black is of course not only a good radiator, but a good absorber -
> and since the plastic encapsulating the silicon will usually be a
> heat-cured plastic, I guess it being black will make this part of
> the process faster and more efficient. This along with the 'real'
> reason, whatever it is, will, I'm sure, be largely based on=20
> economics.
>
> That it is a good radiator is probably more of a + side effect -
> there are many chips that often require heat sinks that have
> shiny bright metal cases - Xilinx Virtex II, for example. In any
> case, a plastic chip body is still not terribly efficient as a heat
> sink. Plus I'm sure I have seen lots of DIP ceramic packages in the
> 'ancient' past that are white, although my memory might be
> fooling me there.
>
> And to support Steve's original statement, there is the added bonus
> that black goes with pretty much any fashion accessory ;-)
>
> ____________________________________
> Sol Tatlow, M.Eng. (Oxon)
> ProDesign Electronic & CAD Layout GmbH
> Product Developer
> Albert-Mayer-Str. 16
> D-83052 Bruckmuehl
> Phone: +49 (0) 8062-808-302
> Fax: +49 (0) 8062-808-333
> Mailto:sol.tatlow@xxxxxxxxxxxxxxxxxxxx
> www.prodesign-europe.com
> ____________________________________=20
>
> why all IC packages are Black in colour?.
> Regards
> Raja
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