Electronics Forum: solderers (Page 816 of 2103)

Re: Tin-Lead thickness on PWB's

Electronics Forum | Mon May 18 20:57:06 EDT 1998 | Earl Moon

.025" pitch so the only problem we run into is too much HASL on the adhesive side causing improper glue dispense. | As Earl keeps saying HASL thickness is hard to impossible to control. I think we need to look hard at OSP's again but then you get in

Re: Tin-Lead thickness on PWB's

Electronics Forum | Mon May 18 22:54:04 EDT 1998 | Dave F

.025" pitch so the only problem we run into is too much HASL on the adhesive side causing improper glue dispense. | | As Earl keeps saying HASL thickness is hard to impossible to control. I think we need to look hard at OSP's again but then you get

Re: Small balls on boards after wave soldering.

Electronics Forum | Thu Apr 16 13:40:08 EDT 1998 | Chrys

| Is there anybody to help me ? | We have small balls appearing on the boards soldered by | wave soldering machine and it looks that use of nitrogen | is linked to the problem (because without nitrogen, we have no more | problems). | That remind you

Re: Altera PQFP240 Solderability

Electronics Forum | Tue Apr 14 09:38:07 EDT 1998 | Earl Moon

| We are having some difficulty soldering a 240 pin Altera device. We use Alpha WS-609, a very generic profile for that solder paste, and a 6 mil stencil with laser cut apertures (1:1 ratio). This is a 20 mil pitch device (aperture size is 10 mils X

Re: Plastic Stencils for screen printing ahesive

Electronics Forum | Wed Apr 08 05:41:37 EDT 1998 | Alan Pestell

We currently use the Loctite system of Glue/stencils and are getting very good results. You may still have a height problem is you solder resist is too thick. The UK sales person is Bob.goss@loctite-europe.com & he may give you more help. The only ot

HASL PCB non-wetting

Electronics Forum | Mon Mar 16 01:06:25 EST 1998 | Victor Ng

Dear all, Recently I have a problem of non-wetting at our wave soldering process. It appears only on the SMT pads for the chip components (at the solder side) of the HASL PCB. With all the same parameters on the wave soldering machine, i

Re: Any help reflow soldering Through Hole parts

Electronics Forum | Fri Mar 06 15:04:11 EST 1998 | Todd N

| We have a double sided pcb that is surface mount on both sides. Now a Through Hole connector has been added. Appart from hand soldering does anyone have info. on reflow soldering the part. The connector is 0.1mm pitch, square legs. | 1) Do you need

Re: Any help reflow soldering Through Hole parts

Electronics Forum | Fri Mar 06 23:02:43 EST 1998 | Scott McKee

| | We have a double sided pcb that is surface mount on both sides. Now a Through Hole connector has been added. Appart from hand soldering does anyone have info. on reflow soldering the part. The connector is 0.1mm pitch, square legs. | | 1) Do you

Re: white dirty solder

Electronics Forum | Thu Jan 15 17:07:18 EST 1998 | Graham Naisbitt

A reasonable assumption but it could be a reaction between your solder resist and the fluxes in the wave and reflow processes. The issue is, how will anyone really know? Then, are they likely to compromise circuit reliability? I have a method that wi

Excess Flux in uBGA rework

Electronics Forum | Tue Sep 25 12:50:13 EDT 2001 | mparker

Since you are mostly concerned about the flux and suspect an application issue, you need to do a few things to validate whats going on. 1. Forget about speed of processing, length of time to do the job. Focus on accuracy first, then speed. with that


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