Electronics Forum: blocked apertures (Page 1 of 4)

Blocking stencil apertures (on purpose)

Electronics Forum | Thu May 01 09:19:59 EDT 2003 | davef

ehess Why do YOU want to block apertures to keep solder from pads?

Blocking stencil apertures (on purpose)

Electronics Forum | Wed Apr 30 21:18:55 EDT 2003 | davef

Morris Why do want to do this [keep solder from pads]?

Blocking stencil apertures (on purpose)

Electronics Forum | Thu May 01 07:17:35 EDT 2003 | davef

Why not fill the apertures with paste and let the paste dry-out? We have found that a hammer and chisel are very effective for removing dried paste.

Blocking stencil apertures (on purpose)

Electronics Forum | Mon Apr 28 09:53:10 EDT 2003 | kmorris

I've got a set of apertures on a stencil that I would like to "plug" or block off. In the past we've done this with Kapton tape, but since this location is close to a fine pitch component, the thickness of the tape prevents good gasketing at the fin

Blocking stencil apertures (on purpose)

Electronics Forum | Thu May 01 15:08:52 EDT 2003 | k_h

If Kapton tape doesn't work, I would recommend eating a few hundred bucks and ordering a new stencil. I think your asking for more trouble trying to plug the apertures with dried paste, glue, or anything else. It will dislodge sooner or later and pro

Blocking stencil apertures (on purpose)

Electronics Forum | Thu May 01 09:02:55 EDT 2003 | ehess

we have used board mask that we let dry. It's tricky to get it flat with no spikes, but after a few tries you'll get it. I like the guys recommendation to try paste and let it dry. we have that problem when the operators do not clean the stencil p

Blocking stencil apertures (on purpose)

Electronics Forum | Thu May 01 13:56:45 EDT 2003 | kmorris

Dave: After the stencil was made with apertures for a connector on this PCB, it was discovered that the connector would have to be handsoldered after SMT reflow. If the solder deposits are left to reflow on the pads, it makes it difficult for the o

blocking off stencil apertures with tape

Electronics Forum | Wed Oct 10 19:04:32 EDT 2001 | mparker

What the heck are you doing having scotch tape in the plant? Isn't there a concern for ESD safety? Ban the scotch tape, then they won't have something to block the apertures with.

blocking off stencil apertures with tape

Electronics Forum | Wed Oct 10 19:02:38 EDT 2001 | mparker

Why not quantify the amount of time spent taping apertures every time you want to use the stencil vs. the cost of a new stencil (about $300, usually)? Look for problems that are created by the blocked aperture method - is there rework down the line t

blocking off stencil apertures with tape

Electronics Forum | Mon Oct 15 17:49:16 EDT 2001 | Leland W.

Something you'll want to consider is what happens with bits of tape that become relocated due to manual or automatic wiping. I've seen them block fine pitch apertures and create an insufficient solder condition that, guess what, wound up in the hand

  1 2 3 4 Next

blocked apertures searches for Companies, Equipment, Machines, Suppliers & Information

Selective Soldering Nozzles

Training online, at your facility, or at one of our worldwide training centers"
SMTAI 2024 - SMTA International

Have you found a solution to REDUCE DISPENSE REWORK? Your answer is here.
PCB Handling Machine with CE

Component Placement 101 Training Course
PCB Handling with CE

Software for SMT placement & AOI - Free Download.
SMT spare parts

Thermal Transfer Materials.