> 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". > -----Original Message----- > From: Hal Murray > Sent: Wednesday, 18 August 2004 1:57 > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: IC package ... > Clear plastic is available for LEDs and photo receptors - other > colors/filters too. An elderly friend, for whom the world of electronics is a bit alien, recent= ly had a remote control going intermittent on him. "Can I replace this?" = he asked, pointing at the IR LED protruding from the remote. I was a bit= puzzled, so he explained, "It's dark, I think it burned out." Aah! He = thought it was an incandescent bulb it dawned on me, so I gave an explana= tion about the dark package. He patiently listened, but then he said "Ye= s, but have a look!" ...and he pulled out 3 more remotes with the IR tra= nsmitters in water clear packaging. Oh dear!! Sandor Daranyi Senior Design Engineer ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu