Electronics Forum: flux residues (Page 81 of 116)

Another Lead Free question ?

Electronics Forum | Tue Jun 10 08:27:18 EDT 2003 | davef

Q1: Suppose I want to qualify a SMT product for lead free, do I need to use a lead free solder paste or any other normal solder paste will do ? A1: Today, most solder pastes contain lead [Pb]. Q2: What are the impact of using a lead free solder past

white residue

Electronics Forum | Wed Jan 27 19:42:34 EST 1999 | parag palshikar

i am working with the noclean process and getting white residues on the bottomside of the board probably due to the wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated temperature a

Solder pot & wire tinning help

Electronics Forum | Mon Mar 02 13:06:36 EST 2020 | charliedci

If you add any "flux cored" wire solder to the pot make sure you have ventilation as the flux will burn off and smoke like crazy. This solder pot is like any used in a wave or selective solder, no flux. The flux is added to wire prior to di

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 10:25:12 EDT 1999 | Boca

| | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that a

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory

| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th

Re: Wave process w/Alpha Metal 310M

Electronics Forum | Tue Oct 19 14:56:55 EDT 1999 | JohnW

Nick, I've run this flux for a while and it's not too bad. There is a tendancy for there to be residue left on the PCB after wave due to the solid's content but it can be minised by putting some effort into setting up your spray fluxer to an optimum

Re: 0603 Solder Beads

Electronics Forum | Mon Nov 01 16:41:58 EST 1999 | Robert Culpepper

Hello Mark, I can�t provide any hands on feedback with 0402 packages but we are using a no clean process with 0603 devices. Here are some parameters which will affect solder balling. Stencil thickness, aperture size, paste viscosity, snap off and bot

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Fri Jul 30 09:43:44 EDT 1999 | C.K.

| We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after

Re: problem when testing the RF product

Electronics Forum | Sun Jun 20 06:30:49 EDT 1999 | Scott Cook

| Do anyone have any experience on assembling high frequency product, 1.8GHz or 2.4GHz. | | In our production line, we manufacture 1.8GHz product with using no clean paste (RMA type) for reflow and no clean wire for rework. In our functinal test,eit

Re: Adhesion loss on passives over wave

Electronics Forum | Fri Mar 19 11:01:42 EST 1999 | Dave F

| Hi folks, | | I am looking for inputs on a long-standing problem encountered in our shop: Bottom-side parts (passives) falling off in the Wave...where the only remnants of the part is a flattened glue dot of proper diameter and volume, and somet


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