Hi Rhonda,

If you're talking yield it depends on the design's minimum feature size
(line width and spacing), your equipment (imaging & etch) and how tightly
you control your chemistry.  For us we are using a VCM (Vertical Conveyor
Module) with cupric chloride.

Hans

~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Materials (Process & Manufacturing) Engineer
Warner Robins Air Logistics Center
Avionics Production Division
Manufacturing Branch
380 Second Street, Suite 104
Building: 640, Mail Stop: LYPME
Robins AFB, GA 31098-1638
Voice: (912) 926 - 1970 Fax: (912) 926 - 7164
mailto:[log in to unmask] <mailto:[log in to unmask]>
http://www.robins.af.mil <http://www.robins.af.mil/>

-----Original Message-----
From: Rhonda Trainor [mailto:[log in to unmask]]
Sent: Monday, July 24, 2000 9:10 AM
To: [log in to unmask]
Subject: [TN]


What is the industry stand on etching 2 oz copper how much should lose on
innerlayers?

Rhonda Trainor
Circuit Technologies Inc.
3622 Clearview Parkway
Atlanta, GA  30340
Phone # 770-458-1700 ext 233
E-mail: [log in to unmask] <mailto:[log in to unmask]>