Is it possible to do not use solder mask (tStop) on a specific area of the board?

Question

Hi!

I designed a board but want to do not use solder mask between the pads where a specific IC will be soldered. I mean, all the other pads (of other ICs) should have solder mask but that specific IC should not.

What can I do?

Thanks in advance.

dukepro · Accepted Answer

On 11/12/2014 10:08 AM, Francisco Pinto wrote: Hi! I designed a board but want to do not use solder mask between the pads where a specific IC will be soldered. I mean, all the other pads (of other ICs) should have solder mask but that specific IC should not. What can I do? Thanks in advance. -- To view any images and attachments in this post, visit: http://www.element14.com/community/message/131134 You could draw a rectangle (or polygon) in the tStop (or bStop) layer to surround the pads of concern. If it's a PTH part, you can draw rectangles on both of these layers. Remember that the tStop and bStop layers are negative - that is, wherever you have an object (rectangle, polygon, wire, etc) on the layer, that's where mask will NOT be. HTH, - Chuck 
 Attachments: 1104.att1.html.zip

friedl · Answer

...if, for some reason, I needed to change my design accordingly. 
 I would not change anything in your design. There will always be something where you tell them, "it's ok to not print this or that, or remove this, ....".