Electronics Forum | Wed May 13 07:24:12 EDT 1998 | Sherry
Does the temp. profiles used to reflow double sided pcb's through a IR oven on FR4 board material have to be re-established if it is changed to polyimide? Boards will be baked out prior to assembly. any response would be most appreciated.
Electronics Forum | Thu May 14 04:11:33 EDT 1998 | JACK CHEN
| Does the temp. profiles used to reflow double sided pcb's through a IR oven | on FR4 board material have to be re-established if it is changed to | polyimide? Boards will be baked out prior to assembly. | any response would be most appreciated.
Electronics Forum | Tue May 05 17:01:25 EDT 1998 | bob
I hear that there is a problem with using ceramic parts that are sizeable. Apparently, there is a mismatch in the Temperature Coefficient of Expansion between the FR4 and ceramic materials which causes the soldered erminations to weaken and eventuall
Electronics Forum | Fri May 15 18:13:35 EDT 1998 | Earl Moon
| | | Does the temp. profiles used to reflow double sided pcb's through a IR oven | | on FR4 board material have to be re-established if it is changed to | | polyimide? Boards will be baked out prior to assembly. | | any response would be most appr
Electronics Forum | Wed Oct 25 10:33:08 EDT 2000 | Chris
I need to know the advantages or disavantages of a plastic or FR4/Flex based BGA over the ceramic based BGA. We have a BGA package we are going to have produced. Some want to have it made out of ceramic because they feel a ceramic package will be a
Electronics Forum | Mon Feb 15 15:33:47 EST 1999 | Earl Moon
| Any info on the pros and cons of FR4 or Polyamide ref the use of soldering PGAs would be helpful. ie. temp co-efficient diffs, baking, wave soldering, Convection reflow etc | I'm sure you know all the basic differences as Tg, X, Y, and Z expansi
Electronics Forum | Fri Sep 01 10:08:08 EDT 2006 | dmascare
The machines I have been looking at range from about $13K to about as high as $30K. These numbers reflect a complete system with all the various sound enclosures, vacuum systems, starter kits etc. Right now I am looking at 60K rpm spindle machines
Electronics Forum | Wed Oct 25 12:24:02 EDT 2000 | Philip
Hi Chris! I hope this will help you! The CBGA uses an array of high melting point solder spheres(Sn10/Pb90) to connect its ceramic chip carrier to an epoxy glass (FR4) PCB using eutectic (Sn63/Pb37) solder joints at both ceramic and card inter
Electronics Forum | Wed May 06 09:16:51 EDT 1998 | justin medernach
| I hear that there is a problem with using ceramic parts that are sizeable. Apparently, there is a mismatch in the Temperature Coefficient of Expansion between the FR4 and ceramic materials which causes the soldered erminations to weaken and eventua
Electronics Forum | Fri May 15 09:07:12 EDT 1998 | Earl Moon
| | I hear that there is a problem with using ceramic parts that are sizeable. Apparently, there is a mismatch in the Temperature Coefficient of Expansion between the FR4 and ceramic materials which causes the soldered erminations to weaken and event
