We announced last year, that the acrylic coating problem was solved.
Unfortunately, the formulation of a message (from Dr Qiao Wang)was
somewhat unclear and misleading. So, the  manufacturer of the Vigon feel
that a correction would be convinient. Agree. So, let's consider these
statements from Ericsson:

1. We have been using A200 for many years and with success, which I have
pointed at before, in order not to miscredit the product. And we will
continue to use A200.

2. The line 'not recommend to use A200' in a earlier mail needs an
explanation. What Dr Wang meant was that A200 might not be used in one
of our applications, because there was an apparent risk of enclosed A200
on inside of the aluminum structure. In that case, the result was kind
of chemical affection because of the high pH value of the A200. The
enclosed A200 leaked out slowly and somehow the blueish crystals and the
veils were created upon the coating. We have solved that problem now,
and the boards are cleaned in a separate procedure.

3. So, we have had some incidents with ENTRAPPED Vigon A200, but in all
normal cases, where the Vigon is 100% washed out, there are never any
problems. As with all saponifiers and any cleaning agents, incorrect use
can cause problems, you have to be familiar with the chemistry and the
whole cleaning procedure in detail.

4. During the exchange of mails, some negative comments about Vigon A200
were expressed from some Technet members. The word is free, and they
have their right to present own findings. That is the basic of Technet
as far as I understand. From Ericsson's viewpoint, we do NOT recommend
anyone to avoid A200. Hope this is clear as Greenland ice.

Ingemar Hernefjord
Ericsson Microwave Systems

---------------------------------------------------
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 847-615-7100 ext.2815
-----------------------------------------------------