Electronics Forum: after (Page 526 of 656)

Re: Tombstoning

Electronics Forum | Tue Oct 12 16:08:44 EDT 1999 | Brian

I need your help! We have been doing double sided surface mount for 4 years now. Up until 6 months ago I have not had a tombstoning problem. Since then I have a fairly high incidence rate of tombstones on the 0603 size resistors (no other parts).

Re: How are your solder balls @ wave solder ?

Electronics Forum | Mon Oct 11 12:24:07 EDT 1999 | John Thorup

Folk's, I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. I was wanting to do a straw poll on you guy's as to the type of resist's yo

Re: bottom side epoxy

Electronics Forum | Thu Oct 07 09:59:01 EDT 1999 | Dave F

I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement

Re: First Article

Electronics Forum | Wed Oct 06 15:29:24 EDT 1999 | Tony

Our first article inspection after machine placement can take several hours depending on the complexity of the board. The operator visually checks the board against the drawing and bill of material. I'd be interested to hear if there are any other

Re: First Article

Electronics Forum | Thu Oct 07 03:19:33 EDT 1999 | Chris May

Our first article inspection after machine placement can take several hours depending on the complexity of the board. The operator visually checks the board against the drawing and bill of material. I'd be interested to hear if there are any other

Re: First Article

Electronics Forum | Thu Oct 07 13:47:19 EDT 1999 | Doug Philbrick

Our first article inspection after machine placement can take several hours depending on the complexity of the board. The operator visually checks the board against the drawing and bill of material. I'd be interested to hear if there are any other

Re: Losing parts in wave

Electronics Forum | Tue Oct 05 18:37:19 EDT 1999 | Morris

I hope that someone can help me with my problem! I am experiencing a lot of glued on parts falling off in the wave solder machine. A little information about my process: 1)We use Loctite 3609 glue that is used up long before its shelf life 2)Our

Re: Losing parts in wave

Electronics Forum | Wed Oct 06 08:55:23 EDT 1999 | Brian Conner

I hope that someone can help me with my problem! I am experiencing a lot of glued on parts falling off in the wave solder machine. A little information about my process: 1)We use Loctite 3609 glue that is used up long before its shelf life 2)Ou

Re: 0402 part identification

Electronics Forum | Wed Oct 06 09:23:47 EDT 1999 | Wolfgang Busko

I would like comments on how the industry handles 0402 parts, regarding identification. Since the parts are too small to be labeled, how can we accurately identify the parts and or values, either before or after assembly? When the boards go to te

Re: help help! Water clean for CSP/BGA package

Electronics Forum | Tue Oct 05 06:03:37 EDT 1999 | Graham Naisbitt

Hi, Help! Could anyone help to enlighten me on this? Question: If I have a CSP/BGA package of size X by Y and the standoff gap between the component and PCB is Z, What is the maximum allowable Y/Z or X/Z that using a normal water cl


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