Jeremy: Standards: � A-600 talks about percentage of solder mask loss allowed, according to the location (eg, laminate, bare copper, gold or nickel, melting metals) and equipment class. � A-610 talks to "Solder Resist Coating - Voids & Blisters" by considering: - Voids not bridging conductors. - Not creating hazardous conditions ... loose mask flakes getting loose and enmeshed in moving parts or lodging between conductive surfaces. - Flux, cleaning agents, or what not being trapped under mask areas.
You have to assess the situation based on the factors of the above standards for your Class 2 (???) equipment.
Consider conformal coating these boards, if your boards don't meet A-610.
My2�
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