Control Depth drill? It seems that laser should work in this case also.
You can also fab the unit a 1-2 sub and drill/plate the via at lower
cost. All depends on the stackup and routing.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice: 802.257.4571.21 Fax: 802.257.0011
http://www.vtcircuits.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Franklin D Asbell
Sent: Wednesday, October 05, 2005 3:04 PM
To: [log in to unmask]
Subject: Re: [TN] New Topic
A good question and I am not suggesting we divulge trade secrets but for
example, we are currently producing solder mask dams down to 1 mil with
.5
clearance. This not only involves controlling the solder mask exposure
and
developing precisely but also drill/image registration as these are for
DUT
pads of 3 mils. This is where technology is taking us today. Now
continuing
this example, I need to know how to drill a 6 mil via-in-pad (as
features
prevent laser drill as an option) and our supplier say's the best they
can
get us to is 8 mils. Would you share some knowledge for other knowledge?
How
many assembler and end user participants in TechNet can answer the 6 mil
drill question?
And for those of you taking notes, these are hypotheticals (except we
can
indeed provide 1 mil solder mask dams).
I don't ask very many fabrication questions on TechNet anymore as I
rarely
receive a response. Is this because they don't know? Are the questions
beyond the capabilities of the majority of TechNet? Or the right people
are
not seeing the question? I believe the latter.
Just more things to ponder...
Franklin
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jim Henderson
Sent: Wednesday, October 05, 2005 12:29 PM
To: [log in to unmask]
Subject: Re: [TN] New Topic
With the auction of a United States PCB fab shop happening on a weekly
basis, I wonder how much information a shop is willing to share can be
attributed to the lack of questions or answers for that matter we are
seeing
here. (Trade secrets stuff)
Jim Henderson
Colonial Circuits, Inc.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Whittaker, Dewey
(AZ75)
Sent: Wednesday, October 05, 2005 12:05 PM
To: [log in to unmask]
Subject: Re: [TN] New Topic
There have been some real whoppers told already on this forum. I don't
know if we want to encourage the participation of additional
fabricators.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Franklin Asbell
Sent: Wednesday, October 05, 2005 9:00 AM
To: [log in to unmask]
Subject: [TN] New Topic
How can we increase the participation of pcb fabricators to the TechNet
forum?
Franklin
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