Electronics Forum | Thu Feb 15 04:22:22 EST 2001 | msaad
This message has nothing to do with BGA short, but I spent 30 min trying to find out how to post a new message but I couldn't find it!!! My question is: Does any one know what is "No residue low tack adhesive film used for registration" is used fo
Electronics Forum | Tue Sep 27 09:18:17 EDT 2005 | patrickbruneel
Amol, Have you tried to conformal coat a bare board as it comes in from the board shop? If you still have the same results at least you know the problem is not related to your process. If you don't have the problem you need to have a closer look at
Electronics Forum | Tue Aug 02 17:55:33 EDT 2011 | dekhead
A couple of points; DEK abandoned Phlegmington, NJ back in '09, and is now USHQ in Rolling Meadows, IL Tel: +1 847 368 1155. A newcomer to the states you might want to look at as well is: Speedprint Speedprint Technology, Americas’ 5804 Breckenrid
Electronics Forum | Wed Feb 14 15:55:31 EST 2001 | Antonio
Fellas, Here's the deal. We're getting shorts on a limited number of boards under the BGAs; about 1 out of 6 boards. The thing is that these boards have about 10 BGAs on them. On the one out of six boards with shorts, the shorts are everywhere and
Electronics Forum | Thu Feb 15 07:04:59 EST 2001 | CRAIGS
Antonio, one possibility I have seen before on BGA shorts was due to chain slippage on the reflow oven due to worn gearing, the slippage was not severe enough to move other SMT devices but was enough to disturb the molten solder under the BGA
Electronics Forum | Mon Sep 26 15:17:54 EDT 2005 | Amol
Hi, I am spray coating PCB's with the above mentioned coating. The problem is that as soon as the boards are coated, there are pin holes on the surface that subsequently turn into localized areas of dewet on te PCB (its almost as it the coating is fl
Electronics Forum | Tue Sep 27 08:22:27 EDT 2005 | Amol
I am using masking tape, the 3M high temp blue masking tape. the problem though doesnt seem to be related to the masking tap as i am seeing pin holes and eventual dewets over entire ckt board (its almost as if the board has chickenpox under black lig
Electronics Forum | Tue May 25 12:43:00 EDT 2010 | jmedernach
I don't have experience with 1B73. I do have a ton of experience with CE-1155. There are a couple of gotchas with this material. First and foremost is that it HATES silicone residue. If the material is not sticking to parts and they aren't cerami
Electronics Forum | Tue May 25 13:03:35 EDT 2010 | jdumont
Hello, I have no experience with CE-1155 but a ton with 1B73. I would say Justin hit it right on the head. 1B73 does not like to be anywhere near silicone residues. We make sure the boards are handled with gloves after wash, before coat. Unfortunat
Electronics Forum | Wed Feb 14 21:14:45 EST 2001 | davef
BGA Shorting 1 Damaged mask in between the BGA pad and via on the substrate. 2 Poor print registration. 3 Poor via segregation from the pads? Are they tented or is there just a dam in between? 4 Review the profile. You can run into a number of p
