Archived posting to the Leica Users Group, 2008/05/10

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Subject: [Leica] Leica R-10 at Photokina 2008
From: tomschofield at comcast.net (Tom Schofield)
Date: Sat May 10 16:37:54 2008
References: <380-2200854823223340@M2W025.mail2web.com> <BA7755C8-F972-4669-939A-DC3420C9B290@comcast.net> <00d801c8b2f3$f6a95a30$e3fc0e90$@net>

Hexagons!

Do they really use a saw these days, or a cnc cutter that could easily  
cut any shape they want?

Tom


On May 10, 2008, at 4:17 PM, Frank Filippone wrote:

> Having made this suggestion tongue in cheek, let me address the  
> problems....
>
> First, there were and probably are circular chips made. Not many,  
> but some.
>
> When you make a wafer of chips, you then CUT the wafer into many  
> parts,
> called chips ( ! ).   This is done with a saw.   First in horizontal  
> rows
> then in vertical rows.    Pretty easy.  Straight cuts.
> Ever try to cut a round thing out??  Ain;t easy.
> Second, if you ( could ) make round chips, you would waste the area  
> between
> the circles....  draw it and you will see what I mean.  Waste is not  
> in the
> IC designers' dictionary.
> So mostly all chips are rectangular.
>
> Now let's consider circuit elements on the chip.
> Some truly are not rectangular.  But again there must be a reason  
> else you
> are wasting chip area.
>
> It has been 40 years since I actually made an active device in a  
> lab.  Too
> long ago to remember all the reasons you do not want a circular  
> circuit
> element.
>
>
> Frank Filippone
> red735i@earthlink.net
>
>
>
> Why not a circular sensor?   Aren't the chips manufactured on circles?
> Tom
>
>
>
>
> _______________________________________________
> Leica Users Group.
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Replies: Reply from red735i at earthlink.net (Frank Filippone) ([Leica] Leica R-10 at Photokina 2008)
Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] Leica R-10 at Photokina 2008)
In reply to: Message from wildlightphoto at earthlink.net (wildlightphoto@earthlink.net) ([Leica] Leica R-10 at Photokina 2008)
Message from tomschofield at comcast.net (Tom Schofield) ([Leica] Leica R-10 at Photokina 2008)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] Leica R-10 at Photokina 2008)