Electronics Forum | Wed Oct 06 03:58:25 EDT 1999 | Brian
| | 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 n
Electronics Forum | Thu Sep 03 12:12:41 EDT 1998 | Dave F
| | | | | | We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | | | | | | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon bed,
Electronics Forum | Thu Sep 03 21:51:16 EDT 1998 | Dave F
| | | | | | | We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | | | | | | | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon
Electronics Forum | Fri Sep 04 08:49:04 EDT 1998 | Ben Salisbury
| | | | | | | | We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | | | | | | | | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, car
Electronics Forum | Mon Jul 10 21:01:06 EDT 2000 | Dave F
Edmund: Responding to your questions: 1 What is purpose of using DI water to wash a PCBA? Compared to tap water, DI water is less likely to leave: � Metal cations on sensitive components. � Salts of Ca, Mg, and other stuff on metals on the assemb
Electronics Forum | Sun Sep 19 03:29:55 EDT 1999 | Brian
| | | | I am not familiar with the "mil" metric. How many inches is in 1 mil? | | | | | | | | ...or 10 mil? | | | | | | | | | | | 1 mil= .001 inches | | | 10 mil= .010 inches | | | Also, it has nothing to do with metric. | | | | | | I was also
Electronics Forum | Sun Sep 19 03:38:43 EDT 1999 | Brian
| | | | | I am not familiar with the "mil" metric. How many inches is in 1 mil? | | | | | | | | | | ...or 10 mil? | | | | | | | | | | | | | | 1 mil= .001 inches | | | | 10 mil= .010 inches | | | | Also, it has nothing to do with metric. | | | |
Electronics Forum | Thu Dec 31 01:09:18 EST 1998 | Kelvin Chow
Dear Micheal, SIR test is used to characterize fluxes by determining the degration of electrical insulation resistance of rigid printed wiring board specimens after exposure to the specified flux. (IPC TM-650 #2.6.3.3 http://www.ipc.org/html/tm2.6.h
Electronics Forum | Thu Dec 31 14:20:35 EST 1998 | Michael Allen
Kelvin, Yes, we're referencing the same spec. I performed the test under the Class 2 conditions (except that I used a 100V bias rather than 50V...but my water-washed microBGAs still passed). Regarding the omegameter test: we have this instrument,
Electronics Forum | Tue Apr 14 15:42:45 EDT 1998 | Scott Cook
| Scott, | I am not really in a position to answer this as fully as I would like because most military work with which I am familiar is subject to some degree of secrecy most especially on the internet. At least we have signed up to such restrictions
