Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Solder Mask

Solder Mask

Solder Mask

Working on my first PWB. . .
Wondering what object do you place on the solder mask layer to instruct where the solder mask is applied, and not applied.


Also, does the gerber data on a layer end up being binary? In other words at each integral point on the layer the information only specifies that there either is something there or there is not. Granted it may not be a binary bitmap, it may employ vector graphics to specify this but there can not be multiple types of "something" on one layer. I am thinking that it is black and white. Then the type of "something" is determined by the type of layer right? If so does this apply to all layers?

Am I on the right track?

Thanks in advance for any help you can give.

RE: Solder Mask

Ok answered my own question I think.

The solder resist mask layer is just that: a mask. Whatever is on it, shows where solder resist is not.

So most boards have nothing on it at all.
P-CAD auto swells the solder resist around pads and not around vias by the "Solder Mask Swell" setting under manufacturing.

When you draw on this layer you are placing solder resist voids where you draw because the layer is edited in photo negative.

Plane layers are also edited in photo negative in P-CAD.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close