[Coco] Cloud-9 Product Comments Wanted

[jdaggett at gate.net]

Mark

Try routing a 100 pin Ball Grid Array IC with 10 by 10 pad pattern. 
Each pad was 0.023 diameter spaced 0.035. That left you 0.012 
between pads. Can just barely fit 0.007 mil traces through. Between 
four pads was just enough room to drop a via. Route out the inside 
50 pins on a two layer board. I have and believe me that was no 
fun. 

james


On 26 Jan 2005 at 20:29, Mark Marlette wrote:

Date sent:      	Wed, 26 Jan 2005 20:29:44 -0600
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From:           	Mark Marlette <mark at cloud9tech.com>
Subject:        	Re: [Coco] Cloud-9 Product Comments 
Wanted
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> The problem with smaller is density. These chips are .020 centers
> pad-pad, 100 pins on a chip the size of a stamp and just about as
> thin. Hard to get that many traces out, thus you jump layers....