Electronics Forum: double sided pcb (Page 3 of 194)

Re: double sided reflow

Electronics Forum | Thu Jun 22 11:02:13 EDT 2000 | Chrys Shea

Jason, Double sided reflow should be no problem. People have been doing it for years. The surface tension of the molten solder will hold the components on the bottom side during your second pass. This is almost always the case, unless you have re

Re: double sided reflow

Electronics Forum | Thu Jun 22 12:25:07 EDT 2000 | Boca

Jason, What Chrys said! Don't try to run the bottom cooler, tried it in the mid 80's, don't work and don't want it to work. If one side of a fab is maintained cooler than liquidus and the other side into reflow it would have an easy 40C temp diffe

double sided reflow criteria

Electronics Forum | Tue Feb 04 18:46:01 EST 2003 | slthomas

"Use the pad mating to lead wetting area." If I get your drift, we're talking about the minimum lead area (assuming the pad has an area that's at least as large as the lead) required to be wetted by IPC-610. Hmmmm...that would take some calculation

Re: BGA fab: what's reasonable practise for double sided PCB?

Electronics Forum | Thu Jul 15 17:53:34 EDT 1999 | Boca

I'm designing a board where the parts will only fit if I do one of the following: 1. Put BGAs on both sides 2. Put BGAs on top, smt TSOPs directly underneath and using blind vias to keep the real estate on the bottom side below the BGA pa

Re: BGA fab: what's reasonable practise for double sided PCB?

Electronics Forum | Thu Jul 15 14:55:24 EDT 1999 | JohnW

I'm designing a board where the parts will only fit if I do one of the following: 1. Put BGAs on both sides 2. Put BGAs on top, smt TSOPs directly underneath and using blind vias to keep the real estate on the bottom side below the BGA pa

Reflowing BGA's 2x on a double sided board

Electronics Forum | Thu Mar 01 00:29:08 EST 2007 | Muhammad Haris

Hi, I believe ,do the BGA side first and then use glue from dispensor for the connector side. THIS CONDITION CAN BE FOLLOWED IF & ONLY IF UR CONNECTORS DO NOT BURN OR LOOSE THEIR PHYSICAL STATES. OR SIMPLY REDESIGN THE

Reflowing BGA's 2x on a double sided board

Electronics Forum | Thu Mar 01 00:27:58 EST 2007 | Muhammad Haris

Hi, I believe ,do the BGA side first and then use glue from dispensor for the connector side. THIS CONDITION CAN BE FOLLOWED IF & ONLY IF UR CONNECTORS DO NOT BURN OR LOOSE THEIR PHYSICAL STATES. OR SIMPLY REDESIGN THE

Tooling for double sided SMT

Electronics Forum | Wed Apr 13 16:57:49 EDT 2005 | bradlanger

My company is just starting to do double sided smt. What options are available for under board support for printing and placing the second side? We are using a Dek 248 printer and Samsung CP Series placement machines.

Re: reflowing double sided SMT

Electronics Forum | Wed Sep 15 06:14:16 EDT 1999 | Wayne S.

I'm looking for some good articles on reflowing of double sided SMT boards. I'd like to come up with a process for low volume prototyping, but need to understand the do's and don'ts. Hello, you can get some insight by typing in double sided boa

double sided step by step

Electronics Forum | Mon Oct 04 12:18:43 EDT 1999 | RICK_EEI

Hi everyone, I need some help on the whole process of double sided surface mount. We have been doing surface mount for about 3 months and we're getting ready to take on our first doule sided board. I just need some step by step process regarding sold


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