One of the differences is that soldermask can be applied using a silkscreen, but also as a photoimageable film, which is probably more prevalent on boards with smaller features. White silkscreen markings aren't generally applied as afilm and imaged, they are normally (perhaps only) run through a screening process. Thus, the photoimageable masking needs to be sensitive to light in order to define the features.
Blair
On Wed, 10 Aug 2011 08:58:39 -0500, Jack Olson <[log in to unmask]> wrote:
>Oh, sorry if I didn't phrase the question very well.
>I'm familiar with the terminology,
>but someone said they had used white silkscreen as a reflective background for display boards,
>(which effectively becomes the mask)
>and it just got me wondering if the materials had different properties.
>
>I SUPPOSE I could do the research on my own instead of bothering everybody (grin)
>
>thanks though,
>Jack
>
>
>.
>On Tue, 9 Aug 2011 20:04:17 -0700, Bob METCALF <[log in to unmask]> wrote:
>
>>Jack,
>>
>>Your question is difficult to answer because it relates to terms different
>>people use. Historically the difference (last 15 years or so) between
>>silkscreen and soldermask is silkscreen is nomenclature marking on PWBs
>>and solder mask is the dielectric covering the circuits. Simply stated
>>that is usually the difference between the two terms.
>>
>>Hope this helps!
>>
>>Regards,
>>
>>Bob Metcalf
>>Western Regional Manager
>>
>>Atotech USA Inc
>>1750 Overview Drive
>>Rock Hill, South Carolina 29730 USA
>>
>>Mobile: 714-334-7667
>>e-mail: [log in to unmask]
>>Internet: www.atotech.com
>>
>>Managing Director: Kuldip Johal
>>
>>From: Jack Olson <[log in to unmask]>
>>To: <[log in to unmask]>
>>Date: 08/09/2011 07:04 AM
>>Subject: Re: [TN] White SolderMask
>>Sent by: TechNet <[log in to unmask]>
>>
>>
>>
>>Thanks everyone, for taking the time to respond.
>>That was a new one for me.
>>(its interesting what I take for granted until something goes wrong!)
>>
>>one more question:
>>Is there a difference between soldermask material and silkscreen material?
>>Aren't they both just colored epoxies?
>>(ok, two questions!)
>>
>>Jack
>>
>
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