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October 1998

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Subject:
From:
"Alderete, Michael" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 5 Oct 1998 12:56:34 -0700
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Roland-

Please see:

1) "A Flexible Production Laser System for Blind Via Drilling," by Anton
Kitai Sr., and Jim Morrison of Lumonics, pg.10 of CircuiTree Magazine,
Vol.11, no.9, September 1998.

---A combination Nd YLF and TEA CO2 laser was used in this study.


2) "Limits of Copper Plating in High Aspect Ratio Microvias," by Steve
Castaldi [MacDermid], Dennis Fritz [MacDermid], and Ron Schaeffer
[PhotoMachining, NH USA], pg.66 of CircuiTree Magazine, vol.11, no.9,
September 1998.

---Includes many color cross-section photos. Vias in study made with
both ESI's UV YAG laser, and a Lumonics (TEA) CO2 laser.


3) "Integrating High Density Interconnect Microvia Technology into the
Multilayer Board Mainstream," by Jim Paulus and Frank Polakovic, pg.68
of CircuiTree Magazine, vol.11, no.10, October 1998.

---UV YAG used in this study. Particular attention focused on desmear
methodologies. Also describes a three company collaborative study,
related to this article, which is now in progress.


-Michael Alderete

You wrote...
----------------------------------------------------------------------

Date:    Sat, 26 Sep 1998 11:03:11 +0200
From:    Roland Jaquet <[log in to unmask]>
Subject: laser drilling / ablation

Message en plusieurs parties et au format MIME.

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Dear Technetters,

We are doing a search for pertinent information on the following as per
to
justify the acquisition of a laser ablation machine, to choose the right
one
etc.. It certainly would help to get equipment manufacturers technical
articles and studies as well as experienced users.

The market in this case is QTA only, for a shop of about 80 employees
enjoying a Europe wide recognition.


Laser drilling pros and cons

CO2 pros & cons

YAG pros & cons

CO2 + YAG pro & cons

Mechanical drilling Z-axis controlled limitations against Laser drilling

Justification of laser drilling against mechanical drilling Z-axis
controlled


Thank you for your help.

Best Regards
Roland

Roland Jaquet
Consultant / Technical Advisor
T +41-22-880-0405
F +41-22-880-0409
GSM +41-79-203-3723
[log in to unmask]
Http://www.Photochemie.ch

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