Unfortunately there is no one-size-fits-all answer for cost on b&b vias. The
cost multiplier is dependant on the number of extra processing steps
required, the materials used, and the type of drilling used to make the
vias.  If you have blind vias for pad cap on a double sided smt assembly,
with blind vias both sides going in only 1 layer that can be mechanically
drilled, and buried vias that run from layer 2 to 1 layer in from the
secondary side, the cost adder is somewhere between 10 and 25%. As your
design becomes more complex the cost adder goes up and it can become a true
cost multiplier (think spiral vias [hideous scream in background followed by
much evil chuckling >;->]).

Jeffrey A. McGlaughlin CID
Sr. Designer
Battelle Memorial Institute
Columbus Ohio
[log in to unmask]



-----Original Message-----
From: Dee Stover [mailto:[log in to unmask]]
Sent: Thursday, April 11, 2002 10:09 AM
To: [log in to unmask]
Subject: [DC] Blind and buried vias


Hi All,

My engineer is asking about the current blind and buried via capabilities
and how much of an increase in cost it causes?

Any info you can pass along is appreciated.

Dee Stover  [log in to unmask]
Associate Technician Design
National Optical Astronomy Observatories
www.noao.edu

----------------------------------------------------------------------------
-----
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV
1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET
DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
----------------------------------------------------------------------------
-----

---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------