[Amps] Semtech diode

[Steve Katz]

Yep, and dice is plural.

The 14" wafers and such are all low resistivity, for making low voltage devices.  Nobody makes them that large with high resistivity material (that I know of) for making stuff like rectifiers.

-WB2WIK/6

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
Behalf Of gdaught6 at stanford.edu
Sent: Monday, October 27, 2008 9:07 PM
To: amps at contesting.com
Subject: Re: [Amps] Semtech diode


> 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 are 
"dice".  That's 1960 terminology from Fairchild, so that ought to be pretty solid.

Now everything is "chips".

73,

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



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