Bob
We used Sealbrite prior to water soluble fluxes, no problem, as per
another post in this thread.
Brian
Bob METCALF wrote:
> It's been many years since I have dealt with Sealbrite. When I did see
> Sealbrite in use, it was on single sided and some simple double sided
> boards, what we used to refer to as "punch and crunch". This was the
> solvent based system. It was a messy process, but effective and VERY LOW
> cost. The principle was the rosin was activated by heat and aided the
> soldering process. As I recall this process was not compatible with
> aqueous (organic acid) flux. The last time I saw it in use, no clean
> fluxes hadn't even been introduced to the market. Without knowing what
> other components are contained in the current Sealbrite, it would be
> difficult to predict what the effect would be on long term reliability.
>
> I would bet the current version of Sealbrite is an aqueous system if it is
> still in use today. I contacted a friend at Enthone and he didn't have any
> info on this product. I'm not sure who is selling it now.
>
> Regards,
>
> Bob Metcalf
> Atotech Western Regional Manager
>
> Cell 714-334-7667
> E-Mail [log in to unmask]
>
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> USA Inc. and may contain CONFIDENTIAL OR PROPRIETARY BUSINESS INFORMATION.
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>
> Charming Chan <[log in to unmask]>
> Sent by: TechNet <[log in to unmask]>
> 01/26/2010 06:48 AM
> Please respond to
> TechNet E-Mail Forum <[log in to unmask]>; Please respond to
> [log in to unmask]
>
>
> To
> [log in to unmask]
> cc
>
> Subject
> Re: [TN] Someone knows SEAL BRITE COATING?
>
>
>
>
>
>
> Hello Bob,
>
> Some of low-end pcb fab shops still apply seal brite coating on
> single-side power pcb board. Is it a bit cost effective than new
> generation OSP?
>
> What's the long-term reliability and ionic cleanness of seal brite coating
> compared with new generation OSP? Thank you.
>
>
> Best Regards
> Charming Chan
>
> -----Original Message-----
> From: Bob METCALF <[log in to unmask]>
> To: [log in to unmask]
> Sent: Tue, Jan 26, 2010 2:20 am
> Subject: Re: [TN] Someone knows SEAL BRITE COATING?
>
>
> I would be surprised if this product is still available, especially in
> t's original form. As others previously stated, it was rosin in solvent.
> he problem with the original product is it required either solvent or
> emi-aqueous cleaning after soldering. In today's world of no clean
> luxes, this product would not work. Perhaps they have formulated a no
> lean version.
> Regards,
> Bob Metcalf
> totech Western Regional Manager
> Cell 714-334-7667
> -Mail [log in to unmask]
> This e-mail and any attachments hereto are business documents of Atotech
> SA Inc. and may contain CONFIDENTIAL OR PROPRIETARY BUSINESS INFORMATION.
> nauthorized disclosure and/or use of information contained in this email
> s prohibited. If you are not the intended recipient, you may not read,
> se, disseminate or copy this message or any other files transmitted with
> t.
>
> Mike Fenner <[log in to unmask]>
> ent by: TechNet <[log in to unmask]>
> 1/25/2010 08:17 AM
> lease respond to
> [log in to unmask]
>
> o
> [log in to unmask]
> c
> Subject
> e: [TN] Someone knows SEAL BRITE COATING?
>
>
>
> blast from the past.
> ealbrite was a Lonco product, a solution of rosin in solvent that was
> ffectively a simple varnish. Air or oven dried. Worked OK.
> Alpha Metals had equivalent products Alpha [2301 2302 etc] which aped it
> easonably well. What happened when everything, including Enthone and
> heir
> roducts, became Cookson I don't know. Most likely these simple materials
> ere let go in favour of Enthone's modern OSPs.
> Regards
>
> ike
>
> ----Original Message-----
> rom: TechNet [mailto:[log in to unmask]] On Behalf Of Charming Chan
> ent: Monday, January 25, 2010 3:27 PM
> o: [log in to unmask]
> ubject: [TN] Someone knows SEAL BRITE COATING?
> Hello All,
> Does anyone help input something about surface finish SEAL BRITE COATING?
>
> ot a talk with pcb fab shop today and I was told that there was SEAL
> RITE
> OATING available for pcb surface treatment. I know nothing about such
> urface finish and I'm quite curious. Thank you.
> Best Regards
> harming Chan
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