Electronics Forum: double-sided component placing smt process flow (Page 1 of 45)

flow thru

Electronics Forum | Fri Oct 29 13:45:03 EDT 1999 | David Vulcano

We are placing several axial components that have STEEL leads. Have noticed that the steel components do not get good flow thru(we manufacture to IPC-A-610 Class II Standards which reqires 75% flow thru) We are using Seho Wave Machines with Nitroge

Overprint, solder flow back

Electronics Forum | Wed Dec 06 07:24:22 EST 2006 | davef

Successful solder paste overprint is a function of the solder paste rheology, solder mask and through hole component stand off. * Solder mask with a high surface energy will permit a larger overprint than a solder mask with a lower surface energy. In

Re: Double sided smt

Electronics Forum | Wed Jun 03 13:50:32 EDT 1998 | Chrys

| Can anyone tell me if there is a reference for smt component height specs on the bottom side of a board, which will also go through wave soldering. A current design I am reviewing has tant caps(7343) and a crystal on the back side. Should I only b

smt basics

Electronics Forum | Tue May 04 10:59:23 EDT 2004 | Evtimov

Hi, It depends of your boards(are they for SMD or not) and how many boards you assemble. The process at all is like that: 1.Stencil printer - to adjust the paste 2. Pick and place machine(for your quantity) 3.Reflow oven Theese are the machines you

Re: Double sided smt

Electronics Forum | Sun Jun 07 06:05:37 EDT 1998 | Bob Willis

| Can anyone tell me if there is a reference for smt component height specs on the bottom side of a board, which will also go through wave soldering. A current design I am reviewing has tant caps(7343) and a crystal on the back side. Should I only b

Re: Double sided smt

Electronics Forum | Sat Nov 06 14:58:45 EST 1999 | Gary Moravchik

Assuming you are using Sn63/Pb37 solder paste, have you tried using a lower temp melting point solder paste for the second pass? For example, use 63/37 for first pass and a Bi58 compound solder paste for the second pass. If I recall, Bi58's melting

Re: Double sided smt

Electronics Forum | Mon Nov 01 22:16:04 EST 1999 | Dean

Without a detailed description of the suspect parts It is difficult to pin-point the exact solution to your process problem. However, whenever possible avoid non-value added additions to your current process. Here is the reality of the situation:

Print-Glue-Wave process

Electronics Forum | Tue Mar 11 10:19:00 EST 2003 | yngwie

We ran doublesided SMT thru Glue and Wave process before and but faced a lot of skip solder. Then the customer told us that they have similar problem when they ran the board so what they did was they print the paste-dispense the glue- place the comp

Re: quoting smt

Electronics Forum | Wed Jun 09 23:48:38 EDT 1999 | dEAN

| I am interested in seeing how some of you quote smt work. Currently we quote off a bom without component packages known then look in data books to find out what type of component they are. This job will be mine soon but i really believe there is a

smt prototype station

Electronics Forum | Wed Nov 17 09:51:25 EST 2004 | AS

I'm looking for advise on setting up a prototype station for smt (we are currently outsourcing smt production, but have a need for rapid in house prototyping). The station must be able to handle only single sided boards with components no smaller th

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