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Re: [Amps] Semtech diode

Subject: Re: [Amps] Semtech diode
Date: Mon, 27 Oct 2008 21:07:12 -0700
List-post: <">>
> Radio WC6W wrote:
> > Hi John,
> >   An individual diode, or other semiconductor device, when it is sawn free 
> > from the wafer but, unpackaged.
> >   
> I thought that was a "Die" or do they just refer to the CPU chip as a die.
> Back when they were making those diodes the largest Silicon wafer was 
> maybe a couple of inches across.  About 35 years ago they were in the 
> neighborhood of 1".  Now they are over 14" in diameter per single 
> crystal wafer.
> Man! What an improvement in yield and decrease in devise cost.

A single device when cut from the processed wafer is a "die".  A bunch of them 
"dice".  That's 1960 terminology from Fairchild, so that ought to be pretty 

Now everything is "chips".


George T Daughters, K6GT
CU in the California QSO Party (CQP)
October 4-5, 2008

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