Electronics Forum | Wed Feb 26 14:34:21 EST 2003 | dhheller
Anybody ever have problems using U shaped aperatures on 0603 components during screen printing?
Electronics Forum | Wed Feb 26 14:59:32 EST 2003 | Brent Robinson
To be honest with you, I'm not sure. Just started working here and they were using U Shaped aperatures on 0603 caps/resistors and getting dry pads. After checking out the programming, no matter how much I slow down the screen printer or what I do,
Electronics Forum | Wed Nov 05 17:36:12 EST 2003 | Stephen
Make sure that the side of the square is the diameter of the pad, That is that the circle is inside the square not that the square is inside the circle. normally the aperatures are smaller than the pad to get gasketing. In this case the idea is to
Electronics Forum | Wed Mar 02 06:15:56 EST 2005 | adlsmt
Russ, are you using any reduction on your stencil aperatures? How much for what type of parts? We seem to have to many problems with resistor network aperatures clogging. How well does this paste release from small aperatures?
Electronics Forum | Fri Dec 17 10:05:59 EST 1999 | Victor Salazar
You might want to check your paste application. We eliminated this problem with reduced aperatures, and homeplate designs on our stencil. The paste process is very important in eliminating solder balls. See Solder aperature guidlines in the forum.
Electronics Forum | Thu Dec 08 22:56:07 EST 2005 | davef
Questions are: * Is the stencil design proper to provide the correct amount of solder paste? * Is the stencil design proper to provide for release of solder paste? * Is solder paste filling the stencil aperatures, prior to separation? * Are stencil a
Electronics Forum | Fri Oct 09 04:06:27 EDT 1998 | Thomas Blesinger
| Thomas: What shape and size are the aperatures to print paste for the connector? Can you do something like ... | | 1 Using a (250m + 120m)/2 or so thick foil? | 2 Pinching the non-connector pads? | 3 Increasing the aperatures for the connecto
Electronics Forum | Thu Feb 18 17:49:28 EST 1999 | Ryan Jennens
Hey all- My question is this: My stencil printer operator has said that he has to wipe our 6-mil stencil each pass to get the paste in the 20-mill pitch aperatures for a QFP to release well. We are using Amtech NC-559 type 3 paste with 89.5% metal
Electronics Forum | Thu Feb 27 10:12:46 EST 2003 | Stephen
I've had good luck with round pads, for 0603 and 0402.
Electronics Forum | Sun Jun 27 16:41:17 EDT 2004 | gmoms
Russ, What aperature reduction and stencil thickness are you running on 16 mil? Best Regards, Paul
