Electronics Forum | Tue Aug 10 06:58:48 EDT 2004 | dka123
dear all, kindly guide me for the use of space electronics hardware assembky of PQFPs and Cqfps, how to form the flat pack leads, bend for 240 pins of 20 mil pitch and what are the Mil standards for them.how to cut the lead guards.can we use FP5 elit
Electronics Forum | Sat Jul 23 09:19:17 EDT 2016 | dalpets
I want to place smd's by hand from tape strips using a vacuum pump. What is the orientation of polarised smd components on reels/tapes? Is there a standard manufacturing orientation, or are there variations? I understand some manufactures have part
Electronics Forum | Tue Nov 20 12:31:12 EST 2007 | kelz
In my past experience, having via's under or attached to SMD lands produces risk. Solder will not consistently wick the same if it is being drawn into a via. This has also caused issues from solder wetting through the via to the other side causing a
Electronics Forum | Mon Nov 05 07:22:02 EST 2007 | aj
Hi, We have had this before - yes they can be plugged and metalised on top . aj...
Electronics Forum | Tue Nov 20 06:02:11 EST 2007 | mattkehoe
http://www.sipad.com/sipad_vip.htm mk
Electronics Forum | Fri Nov 23 17:33:11 EST 2007 | mika
English => Swenglish, is not so good... Ds.
Electronics Forum | Mon Nov 05 02:51:48 EST 2007 | omidjuve
our boards have many smd pads that has vias under them so when the screen printer wants to print the solder paste on it , it will penetrate through the via to the bottom side of the board and cause many problem for us . i want to know that is it sta
Electronics Forum | Fri Nov 09 10:15:27 EST 2007 | devajj
Of course if you are an OEM you could go back to your design engineers and tell them via's in SMD pads is unacceptable. Put that in your DFM design guidelines. If you are an EMS provider you can also influence your customer by explaining the impa
Electronics Forum | Thu Apr 19 02:49:07 EDT 2007 | ray
I observed some black dot or some oxidation occured on chip termination on pcba reflowed fews weeks ago as buffer stock. The solder joint and fillet wetting is good and shinning. It is an acceptable or defect condition per IPC standard/requirement? W
Electronics Forum | Mon Nov 05 06:27:23 EST 2007 | grantp
Hi, We are also interested in this, and I have heard you can get the PCB's with the via's plugged. Also, if the via's are small, the solder should not penetrate? Anyone have any further info? Grant
