Electronics Forum | Mon May 10 15:17:37 EDT 1999 | C.K.
| If I clean my assembly and find no visable contamination with the unaided eye, do I need to do cleanliness testing prior to conformal coating? | More than likely, you're okay if you can't see any contamination with the unaided eye. However, the
Electronics Forum | Tue Feb 16 02:19:29 EST 1999 | Joe
| I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the
Electronics Forum | Fri Jan 22 14:24:44 EST 1999 | Dave F
| I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | Michael: Let's take a different angle on this. Why not ha
Electronics Forum | Fri Jan 22 17:38:07 EST 1999 | Michael Larsen
| | I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | | | Michael: Let's take a different angle on this. Why
Electronics Forum | Tue Jan 12 21:42:33 EST 1999 | Jon Medernach
What's important in stencil printing (which differs from screen printing) is providing a consistant volume of paste at each interconnect. The process window varies in proportion to the pitch. More than 60% of all defects are related to solder depos
Electronics Forum | Fri Nov 13 23:33:33 EST 1998 | Kallol Chakraborty
| | | I believe that gold fingers on my circuit boards are being | | | contaminated and need to clean them with some chemical | | | solution. Any recommendations. | | | | | Chuck: What is the type and source of your contamination? Dave F | | We a
Electronics Forum | Thu Sep 17 12:08:13 EDT 1998 | Graham Naisbitt
Wayne, I think Dave and Justin are correct but I would just add my twopennworth: Your customer presumably wants to know if the end-product will be reliable? If he/she wants you to prove cleanliness, ask them for the spec they want to work to and app
Electronics Forum | Tue May 26 14:42:55 EDT 1998 | Justin Medernach
| We currently bake plastic SMT parts in accordance with the IPC guidelines for moisture sensitive parts. Because we have double-sided boards that are subjected to either an aqueous or semi-aqueous cleaning process, we do a 24 hour bake at 125 deg.
Electronics Forum | Fri Mar 20 10:31:19 EST 1998 | Mick Jones
| I will be starting a conformal coating process soon, I am looking for any pointers on | 1) Best method for masking components, tape mask, liqued mask | 2) Which is best Spray or Dip? | 3) Compatiblity with no clean solder paste (flux residue) | I h
Electronics Forum | Wed Mar 06 21:16:17 EST 2002 | davef
�What does 5 micrograms of chloride mean to me?� * With SIR testing, you can show no detrimental leakage currents under humid conditions, no corrosion, no metal migration, which are the big factors in figuring out electrochemical reliability. People
