Electronics Forum: bottom (Page 9 of 227)

Re: BOTTOM SIDE COMPONENT HOLDING DURING DOUBLE SIDE REFLOW

Electronics Forum | Sat May 09 11:57:01 EDT 1998 | Bob Willis

How about checking out the Reports on Double Sided Reflow and Pin IN hole Reflow from the SMTA head office. They are both available now so give the SMTA a call !!!! Dear Freinds, DOES ANY ONE OF YOU WILL BE KIND ENOUGH TO GIVE SOME INPUT ON DOUBL

Re: BOTTOM SIDE COMPONENT HOLDING DURING DOUBLE SIDE REFLOW

Electronics Forum | Wed May 06 13:44:58 EDT 1998 | Chrys

Dear Freinds, DOES ANY ONE OF YOU WILL BE KIND ENOUGH TO GIVE SOME INPUT ON DOUBLE SIDE REFLOW OF COMPONENTS WHAT ABOUT BOTTOM SIDE COMPONENT HOLDING DURING 2ND SIDE REFLOW? ANY IDEA OTHER THAN USING SLDERPASTE WITH OFFSET MELTING POINT, EPOXY DI

Double Reflow

Electronics Forum | Tue Dec 21 00:10:00 EST 1999 | Edmund

Currently i am producing a board using dloble reflow process. The bottom side is mostly 0603 chips and some SOIC. The top side is mostly QFP and some heavy component. During the double reflow process , the capacitor chip on the bottom side drop(same

reflow/cure/wave for double side assembly

Electronics Forum | Sun Oct 03 18:26:17 EDT 1999 | park

What are pro's and con's of reflowing top side first and curing bottom side chip components, and then wave soldering bottom side? How about curing bottom side first and reflowing top side later? What percentage of companies run reflow/cure/wave for

Wave Soldering Active Components

Electronics Forum | Fri Mar 19 18:47:16 EST 1999 | John Gill

Hi Folks, This is my first surface mount board, so I asked our assembly house for some tips. They said only passives on the bottom side-preferably no smaller than 0805, 0603 only if I have to. I would think that an SOT-23 would be OK on the bottom.

Bottom side smt and thru hole

Electronics Forum | Tue May 26 22:13:15 EDT 1998 | Pat Copeland

R&D is currently designing a board with smt components on both sides of the board. They are adding a 16 pin IC Gull wing. on the bottom side of the board. I have asked for only caps and resistors to be placed on the bottom side. Is there a recommende

intro to 2 sided assembly

Electronics Forum | Tue Dec 04 09:35:58 EST 2001 | jdill

I have successfully reflowed 208,100 pin QFP'S and SOJ 28's on the bottom side of the board. The only thing i am "SCARED" to reflow on the bottom side are BGA'S. We used to turn off the bottom heaters but we did a trial run with them off and the boa

double side reflow soldering

Electronics Forum | Tue May 07 22:25:15 EDT 2002 | L_ch

Hello, As you know for the double side assembly PCBs, we normally first place the bottom side, then place top side after reflow soldering of bottom side. are there any other considerations for the sequence of reflow soldering ( bottoms side first, to

Double sided BGAs

Electronics Forum | Thu Jun 23 14:13:52 EDT 2005 | Frank

Luckily I haven't needed to do very many bottom side BGA placements. But I have also heard of trying to use a higher temp solder for bottom side only and your normal solder for the top side. This way the bottom side solder doesn't get hot enough to

Flux Residues In Lead Free Wave Soldering Process

Electronics Forum | Sat May 27 12:50:14 EDT 2006 | GS

HI, just my 0,00001 cents Which preheat system does your wave solder has? for instance ? - IR ? - Bottom only ? - IR + Forced Air ? (bottom) - IR + Forced Air (bottom) IR top ? PCB thickness ? Appropriate preheat is important when looking to f


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