Kelly/Doug,
        Looks like you were right. Thanks for your help.
- Mike
> ----------
> From:         [log in to unmask][SMTP:[log in to unmask]]
> Sent:         Tuesday, December 07, 1999 8:27 PM
> To:   Hiteshew, Michael
> Subject:      Re: Fungicidal Laminate
>
> Mike,
>
> This is an obscure issue which dates back way before my time but I will do
> my
> best.  I am traveling so this will be from memory but if you need
> clarification
> I will be back in my office Friday - 603-934-5642.
>
> In the cancelled 13949 spec there was a requirement for fungus resistance
> which
> was droped except for initial qual testing in IPC 4101.  I am not aware of
> any
> laminates currently available anywhere in the world that do not meet this
> requirement.  To fail in fact would take a real effort.  It was deleated
> from
> 4101 because it just is not really relevent to todays products.  I can not
> speak
> for solder mask or coating but I believe the situation is similar.  I am
> not
> aware of anyone "treatin" any of these materila for fungus resistance -
> they
> just don't support growth.  Unless you need something very special you
> should
> not need to do anything special as far as callouts (and if you do need
> something
> special I am not sure what to tell you to do).
>
> Call if this does not clear it up.
>
> ERIK
>
>
>
>
> "Hiteshew, Michael" <[log in to unmask]> on 12/07/99 03:11:35 PM
>
> To:   Erik Bergum/PolycladUS/Cookson@Cookson
> cc:
>
> Subject:  Fungicidal Laminate
>
>
>
>
> > Hi Erik,
> >    As you will see when you read this email, I was referred to your
> > expertise on the IPC TechNet. Here at Lockheed, we're in some confusion
> > about fungicidal laminates. If you have time, please read through these
> > messages (from the bottom up) and see if you can clear up our confusion.
> > Specifically, is it necessary to specify that a base material or prepreg
> > meet fungus resistance requirements (as IPC-6012 implies) or are all
> > materials treated with fungicide when manufactured to IPC-4101? Thanks
> in
> > advance for your help.
> >    Please carbon-copy your reply to the TechNet. Thanks again.
> >
> > -Mike
> >
> > ----------
> > From:   Kelly M. Schriver[SMTP:[log in to unmask]]
> > Sent:   Tuesday, December 07, 1999 7:31 AM
> > To:     TechNet E-Mail Forum.; Hiteshew, Michael
> > Subject:     Re:      Re: [TN] Fungicidal Laminate
> >
> > Mike -
> >
> > Recommend you contact Erik Bergum at Polyclad Laminates (603)934-5642.
> > Erik
> > is the chairman of IPC 3-11 Laminate and prepreg materials subcommittee
> > and
> > the major mover behind IPC-4101.
> >
> > Regards - Kelly
> > -----Original Message-----
> > From: Hiteshew, Michael <[log in to unmask]>
> > To: [log in to unmask] <[log in to unmask]>
> > Date: Monday, December 06, 1999 11:47 AM
> > Subject: Re: [TN] Fungicidal Laminate
> >
> >
> > Kelly
> >         We took your recommendation and looked at IPC-4101, table 5.
> > However, our interpretation is a little different from yours. We
> interpret
> > table 5 as a qualifying table. That is, in order to be qualified to
> > IPC-4101, a vendor must demonstrate they can produce material to all the
> > listed requirements. That's not saying that all material meets those
> > requirements by default.
> >         In addition, a look through the individual specification sheets
> > will
> > show that fungus resistance does not appear (on any that I can find).
> This
> > reinforces our belief that fungus resistance is a special requirement
> that
> > must be specified in addition to the base material.
> >         I'd be interested in hearing from material and pwb manufacturers
> > on
> > this.
> >
> > -Mike
> >
> > > ----------
> > > From:         Kelly M. Schriver[SMTP:[log in to unmask]]
> > > Sent:         Monday, December 06, 1999 7:36 AM
> > > To:   TechNet E-Mail Forum.; Hiteshew, Michael
> > > Subject:      Re:      Re: [TN] Fungicidal Laminate
> > >
> > > Michael -
> > >
> > > I think what Doug is trying to point out is that the requirement for
> > > fungus
> > > resistance is already posted in the laminate material specification in
> > > most
> > > cases (ref. IPC-4101 table 5) as a part of the basic resin system
> > > qualification.  Accordingly, an additional requirement stipulated in
> the
> > > purchase order would not be required, and may only cloud the issue by
> > > imposition of additional specifications.
> > >
> > > Regards - Kelly
> > > -----Original Message-----
> > > From: Hiteshew, Michael <[log in to unmask]>
> > > To: [log in to unmask] <[log in to unmask]>
> > > Date: Friday, December 03, 1999 4:42 PM
> > > Subject: Re: [TN] Fungicidal Laminate
> > >
> > >
> > > Hi Doug,
> > >         We've been discussing this same issue here at Lockheed.
> > According
> > > to
> > > IPC-6012 (Qualification and Performance Specification for Rigid
> Printed
> > > Boards) - Section 3.11 (p17), "Special Requirements", reads in part:
> > >         "When specified on the procurement documentation, some or all
> of
> > > the
> > > special requirements listed in the following paragraphs shall apply.
> > ...".
> > > Section 3.11.3, which follows this statement, covers fungus
> resistance.
> > > Notice the key words "When specified..". This qualifying comment
> occurs
> > > again in Appendix A (p27). In addition, MIL-HDBK-454, Section 4.4,
> > "Fungus
> > > Testing", reads in part:
> > >         "Group II materials should be subjected to the fungus test
> > > specified
> > > in MIL-STD-810...". Under Group II materials are epoxy glass-fiber
> > > laminates
> > > and epoxy resin. Also listed is polyurethane, the main component in
> Type
> > > UR
> > > conformal coating. Type AR (acrylic) is listed as a Group I (fungus
> > inert)
> > > material.
> > >         So it sounds like these organic materials are fungus nutrients
> > > and,
> > > depending on your application environment, may need to treated with
> > > fungicide. Since this is a special requirement, it will need to
> > specified
> > > on
> > > the procurement documentation.
> > >
> > > Michael Hiteshew
> > > Lockheed Martin Launching Systems
> > > [log in to unmask]
> > > (410) 682-1259
> > >
> > >
> > > > ----------
> > > > From:         Douglas O. Pauls[SMTP:[log in to unmask]]
> > > > Reply To:     TechNet E-Mail Forum.;[log in to unmask]
> > > > Sent:         Friday, December 03, 1999 7:34 AM
> > > > To:   [log in to unmask]
> > > > Subject:      Re: [TN] Fungicidal Laminate
> > > >
> > > > In a message dated 12/02/1999 2:54:44 PM US Eastern Standard Time,
> > > > [log in to unmask] writes:
> > > >
> > > > >
> > > > >  It seems to be my week for strange requests.
> > > > >  Does anyone know of a fungicidally treated FR4 laminate? Or of
> any
> > > > >  fungicidal treatment which can be applied to an assembled circuit
> > > > board.
> > > > >
> > > >
> > > > I can't really see the need for a fungicide.  Most IPC specs have
> the
> > > > requirement that the base material, such as laminate, mask, and
> > coating
> > > be
> > > > non-nutrient in nature, which means it would not support growth of a
> > > > fungus.
> > > >
> > > > Doug Pauls - CSL
> > >
> >
> >
>
>
>
>

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