Electronics Forum | Thu May 17 15:17:42 EDT 2001 | blnorman
Parylene is arguable the best conformal coating there is, unfortunately it's also the most expensive. We had considered using it some time back, but due to environmental and safety issues, we would have had to build a new building to house the proce
Electronics Forum | Wed May 23 13:34:06 EDT 2001 | Mark Smithers
The trend of the smaller PCB and devices has been occurring for many years now. However, recently, we are seeing signs that a segment of the market is returning to larger board sizes....30" x 30" and larger. Does anyone have good sources for data a
Electronics Forum | Wed May 23 13:36:52 EDT 2001 | Mark Smithers
The trend of the smaller PCB and devices has been occurring for many years now. However, recently, we are seeing signs that a segment of the market is returning to larger board sizes....30" x 30" and larger. Does anyone have good sources for data a
Electronics Forum | Wed May 30 21:16:05 EDT 2001 | davef
MPM AP-27 preferred over MPM AP-20 The issue is release of paste from the stencil. A vertical lift printer kinda snaps the stencil away from the board to complete the print cycle. The inertia and the rheometric properties of the paste make it rele
Electronics Forum | Tue Jun 05 21:14:10 EDT 2001 | davef
You aren't going to post our stuff on your "Hey, I'm the wizard site", are you? Board fab, Pad coatings, OSP 1 OSPs: Imidazole (Via Systems) is good. Entek (Enthone) works, but requires strict thickness control in fab. 2 Enthone CU56 allows one t
Electronics Forum | Wed Jun 06 10:59:43 EDT 2001 | wbu
It�s hard to tell you one good profile for a specific machine cause profiles are mainly dependent on the specific assembly you want to rework. My aproach to this problem is trying to get a close as possible profile as under normal reflow conditions u
Electronics Forum | Thu Jun 14 21:06:49 EDT 2001 | davef
We rate each board for producibility. [Our rating chart may be based on some things that Bob Willis did. Check his site [http://www.bobwillis.co.uk/ ] for all kinds of neat stuff. Maybe even bring him in to help you sort through things.] There
Electronics Forum | Thu Jun 14 10:50:38 EDT 2001 | Dave G
Are you changing heads because of pastes or just changing widths ? Changing the head w/o cleaning is fairly straight forward. (Actually it's Pretty easy.) We have two widths - 8" & 12". We switch twice a day with very few problems but, we don't have
Electronics Forum | Fri Jun 15 13:06:15 EDT 2001 | CPI
I Agree with Dave, Check spec on cap some devices have temp constraints (can exceed x degrees for more than x time or can not exceed a certain ramp rate). Check that then go through the rest of the process chances are its not your machine if no other
Electronics Forum | Wed Jun 13 16:58:26 EDT 2001 | Ken Lester
Greg; The universal profile concept maybe misleading. the main objective of a reflow system is to reach a certain temperature and maintain it for the required period of time. If your initial profile is set to accomodate this on any board the only va
