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Date: | Tue, 3 Apr 2001 10:17:26 -0500 |
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By those definitions, option 3 would be the smallest, since
.005" holes have been drilled for years. I see the dilemma.
Gary McCauley
PC Boards, Inc
-----Original Message-----
From: Ray Humphrey [mailto:[log in to unmask]]
Sent: Tuesday, April 03, 2001 9:38 AM
To: [log in to unmask]
Subject: Re: [TN] Low Aspect Via definition
Michael,
I have found that getting a straight, definitive answer to questions like
yours is almost impossible. I went through the same exercise trying to get
the definition of a micro via. After doing extensive research and talking
to a lot of PCB fabricators, I came up with the following:
1. Any via with a hole < .008"
2. Any via with a hole < .006"
3. Any via with a hole too small to be mechanically drilled, usually blind.
Since it appears to be a moving target, I settled on number 3.
Best regards,
Ray Humphrey
Senior PCB Designer
Maxim Integrated Products
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