Adam,
Check out this page. This should help you figure out from nozzle to work distance and nozzle interval, the nozzle angle you need.
http://www.spray.com/techserv/coverage_calculator.asp
In the past colleagues and I have found that vertical developing is good but etching has uniformity problems if the panel is not rotating in a wheel.
Chuck Brummer
Siemens
-----Original Message-----
From: Adam Seychell [mailto:[log in to unmask]]
Sent: Tuesday, September 30, 2003 10:10 PM
To: [log in to unmask]
Subject: [TN] spray nozzle configuration for etching
Hello,
I am constructing a vertical spray etching machine for processing
single panels. A series of nozzles will periodically oscillate
back and forth across the panel in a vertical motion. The nozzles
will be the fan type as opposed to cones. I am in need of a
little help choosing the appropriate nozzle. I was hoping someone
here might have some knowledge on typical nozzle configurations
used in spray etching equipment.
The nozzles (NF series by BETE) are available in fan angles of
15,30,50,65,80,90,110 and 120 degrees and I don't have the
experience to choose the right one.
My initial calculations say to use 65° fan nozzles with a
spraying distance of about 120 mm from the panel, and then
experimentally determine the needed jet overlapping for a uniform
etch.
regards,
Adam Seychell,
Australia.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------