Post by thread:[EE]: Wafer vs. die IC package (oops

Oops - should be wafer vs. dice package -----Original Message----- From: Charles Craft <spam_OUTchuckseaTakeThisOuTmindspring.com> Sent: Dec 13, 2005 10:57 AM To: .....piclistKILLspam@spam@mit.edu Subject: [EE]: Wafer vs. die IC package http://www.winbond.com.tw/c-winbondhtm/partner/PDFresult.asp?Pname=1021 My kid has a toy car carrier that's outfitted with MFID (Magnetic Field ID) to ID the cars on the truck. The transponder chip is available in a wafer or die package. What's the difference?

In message <21602239.1134490216391.JavaMail.rootKILLspammswamui-bichon.atl.sa.earthlink.net>> Charles Craft <.....chuckseaKILLspam.....mindspring.com> wrote: > Oops - should be wafer vs. dice package A dice is a single semiconductor chip. A wafer is an uncut disc of silicon with multiple dice on it. Later. -- Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT EraseMEphilpemspam_OUTTakeThisOuTphilpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB http://www.philpem.me.uk/ | Panasonic CF-25 Mk.2 Toughbook ... A bird in the hand is safer than one overhead.

On Tue, Dec 13, 2005 at 04:32:37PM +0000, Philip Pemberton wrote: > In message <21602239.1134490216391.JavaMail.rootspam_OUTmswamui-bichon.atl.sa.earthlink.net>> > Charles Craft <@spam@chuckseaKILLspammindspring.com> wrote: > > > Oops - should be wafer vs. dice package > > A dice is a single semiconductor chip. > A wafer is an uncut disc of silicon with multiple dice on it. Hmm... Would it be possible to go off and buy a wafer anywhere? I've always kinda wanted one, make a nice christmas present to myself. :) -- KILLspampeteKILLspampetertodd.ca http://www.petertodd.ca

Search eBay for "ic wafer" or "silicon wafer" -----Original Message----- From: Peter Todd <RemoveMEpeteTakeThisOuTpetertodd.ca> Sent: Dec 13, 2005 1:06 PM To: "Microcontroller discussion list - Public." <spamBeGonepiclistspamBeGonemit.edu> Subject: Re: [EE]: Wafer vs. die IC package (oops - dice) On Tue, Dec 13, 2005 at 04:32:37PM +0000, Philip Pemberton wrote: > In message <TakeThisOuT21602239.1134490216391.JavaMail.rootEraseMEspam_OUTmswamui-bichon.atl.sa.earthlink.net>> > Charles Craft <RemoveMEchuckseaTakeThisOuTmindspring.com> wrote: > > > Oops - should be wafer vs. dice package > > A dice is a single semiconductor chip. > A wafer is an uncut disc of silicon with multiple dice on it. Hmm... Would it be possible to go off and buy a wafer anywhere? I've always kinda wanted one, make a nice christmas present to myself. :) -- peteEraseME.....petertodd.ca http://www.petertodd.ca

> > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > always kinda wanted one, make a nice christmas present to myself. :) > > -- > EraseMEpetepetertodd.ca http://www.petertodd.ca > -- Try http://www.goldmine-elec-products.com/home.asp and search "wafer" I have one framed in my office at work. It draws a lot of questions. Lyle

Well, if you need to cut it up eBay Item number: 7571146555 ESEC THEROCARBON WAFER CERAMIC GLASS SILICON DICING SAW around $ 12K USD... Hazelwood Lyle wrote: {Quote hidden}>>Hmm... Would it be possible to go off and buy a wafer anywhere? I've >>always kinda wanted one, make a nice christmas present to myself. :) >> >>-- >>RemoveMEpeteEraseMEEraseMEpetertodd.ca http://www.petertodd.ca >>-- > > > Try http://www.goldmine-elec-products.com/home.asp > and search "wafer" > > I have one framed in my office at work. It draws a lot of questions. > > Lyle >

In message <RemoveME20051213180608.GA22623spam_OUTKILLspampetertodd.ca> Peter Todd <RemoveMEpeteTakeThisOuTspampetertodd.ca> wrote: > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > always kinda wanted one, make a nice christmas present to myself. :) I've seen them on Ebay occasionally. I wouldn't mind something like that myself - it would make a great addition to the "Great Wall O' Posters" :) Later. -- Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT EraseMEphilpemspamspamBeGonephilpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB http://www.philpem.me.uk/ | Panasonic CF-25 Mk.2 Toughbook ... I'm in shape ... round's a shape isn't it?

On 12/14/05, Philip Pemberton <RemoveMEphilpemKILLspamdsl.pipex.com> wrote: > In message <20051213180608.GA22623STOPspamspam_OUTpetertodd.ca> > Peter Todd <spamBeGonepeteSTOPspamEraseMEpetertodd.ca> wrote: > > > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > > always kinda wanted one, make a nice christmas present to myself. :) > > I've seen them on Ebay occasionally. I wouldn't mind something like that > myself - it would make a great addition to the "Great Wall O' Posters" :) As long as we are going [OT]... Are these posters of die photographs? I'd love to know where to get some. Bill -- Psst... Hey, you... Buddy... Want a kitten? straycatblues.petfinder.org

On Tue, 13 Dec 2005, Peter Todd wrote: > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > always kinda wanted one, make a nice christmas present to myself. :) You may be able to get one by dumpster diving near a semiconductor company (that is not on the leading edge of technology). Peter

On Wed, 14 Dec 2005, Philip Pemberton wrote: > In message <KILLspam20051213180608.GA22623spamBeGonepetertodd.ca> > Peter Todd <EraseMEpeteEraseMEpetertodd.ca> wrote: > >> Hmm... Would it be possible to go off and buy a wafer anywhere? I've >> always kinda wanted one, make a nice christmas present to myself. :) > > I've seen them on Ebay occasionally. I wouldn't mind something like that > myself - it would make a great addition to the "Great Wall O' Posters" :) Make sure you do not get the thin kind. It is nearly impossible to handle without tools afaik. It would be less than 0.5mm thick and at least 120mm diameter. If you manage to fold it you will find out how cleaving is done ... Peter

On 12/13/05, Peter Todd <@spam@pete@spam@spam_OUTpetertodd.ca> wrote: > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > always kinda wanted one, make a nice christmas present to myself. :) Order and ye shall receive: http://www.goldmine-elec-products.com/products.asp?dept=1177 Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams

On December 14, 2005 11:49 am, Peter wrote: > On Tue, 13 Dec 2005, Peter Todd wrote: > > Hmm... Would it be possible to go off and buy a wafer anywhere? Perhaps you may be lucky finding generic chips like CMOS 40xx or TTL types like 74xx, but I don't think you have a chance with custom chips. > > I've always kinda wanted one, make a nice christmas present to > > myself. :) > > You may be able to get one by dumpster diving near a semiconductor > company (that is not on the leading edge of technology). Consider yourself lucky if you manage that. In terms of bleeding edge or prototype houses, wafers can be jealously guarded until properly disposed-of unless you know someone in charge of disposing them properly. Even some bug-ridden wafers get sent to customers who ride the bleeding edge so that they can at least test out some functions while waiting for next revision prototypes even if the chips on the wafer (as a whole) don't or will never work. Previous place I worked with, I was in contact with someone kind enough to assign a trophy.... yes, there is that "cool" factor to having one. On the other hand... more generic chips, you might have some luck dumpster diving but I'm guessing they will be cracked or whatever if not simply recycled. Good Luck if diving, but personally, I think you'd have better luck if going to the front desk and asking if it's possible to get one for yourself.

On Wed, Dec 14, 2005 at 04:05:38PM -0500, Josh Koffman wrote: Just wanted to say, thanks a lot to everybody, that's a lot of great links and suggestions for me to take a look at over the holidays. Fairly cheap too! > On 12/13/05, Peter Todd <spamBeGonepeteKILLspampetertodd.ca> wrote: > > Hmm... Would it be possible to go off and buy a wafer anywhere? I've > > always kinda wanted one, make a nice christmas present to myself. :) > > Order and ye shall receive: > www.goldmine-elec-products.com/products.asp?dept=1177 -- .....petespam_OUTpetertodd.ca http://www.petertodd.ca