Board level soldermask application requirements such as coverage,
registration, skips and adhesion are covered in the performance
standard, IPC-6011/12.
Regards,
Gary Ferrari
Ferrari Technical Services
860-350-9300
Jeffrey Bush wrote:
> I am not sure what the surface energy is referring to, but what is
> important to most users if the Dielectric Withstanding Voltage.
> IPC-SM-840C requires a 500 VDC minimum DWV performance on the finished
> product. Based on your specific materials performance characteristics,
> the minimum required thickness can be determined.
>
> IPC-SM-840 is a basic guideline for the soldermask suppliers and some
> basic testing guidelines for the user. We also use Telcordia (BellCore)
> TA-NWT-000078 which has some specific qualification and testing
> requirements for SIR, etc.
>
> Jeffrey Bush
> Director, Quality Assurance and Technical Support
> VERMONT CIRCUITS INCORPORATED
> 76 Technology Drive - POB 1890
> Brattleboro, Vermont 05302
> Voice - 802.257.4571 ext 37
> Fax - 802.257.0011
> <http://www.vtcircuits.com/>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Leigh Jansen
> Sent: Monday, February 13, 2006 6:59 AM
> To: [log in to unmask]
> Subject: [TN] SOLDER RESIST - PRODUCTION STANDARDS
>
> Dear all,
> I would be very keen to find out from both board manufacturer and end
> user
> perspectives what standards (national/international or otherwise) that
> you
> follow to control the quality of solder resist coated boards.
> IPC SM840 relates to solder resists but would not look at the surface
> energy
> of the resist coating ? Does anyone specify a minimum or maximum value
> or
> range for QA purposes ?
>
> Thanks,
>
> Leigh Jansen
> Development Manager
>
> Concoat Ltd
> Alasan House, Albany Park, Frimley Road, Camberley, Surrey GU16 7PH
> Tel: 01276 691 100 Mobile 07919 470 959
>
> Providing Reliability in Electronics
> A British Manufacturer : Part of Chase Specialty Coatings
>
> www.conformalcoating.com <http://www.conformalcoating.com/>
> www.concoat.co.uk <http://www.concoat.co.uk/>
> www.chasespecialtycoatings.com/info.html
>
>
>
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>
>
>
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