Electronics Forum: mount devices (Page 10 of 24)

Through-hole/SM mix

Electronics Forum | Fri Oct 12 13:40:56 EDT 2001 | Steve

I need help with a process issue. I am dealing with a board design that is double-sided SM with a couple high density through-hole devices. I want to flow solder the through-hole stuff, so what is the best way to deal with them? Since one of the thro

Re: I looking for a beta site for a new drying process

Electronics Forum | Thu Aug 19 14:06:07 EDT 1999 | Stu Leech

We have developed a new process for removing moisture from surface mount devices. We have one site where PCB laminate drying has been reduced to 1.5 hours. A standard oven took 4 hours to do the job. I am looking for a firm who does large sca

Re: I looking for a beta site for a new drying process

Electronics Forum | Thu Aug 19 14:52:13 EDT 1999 | John Thorup

We have developed a new process for removing moisture from surface mount devices. We have one site where PCB laminate drying has been reduced to 1.5 hours. A standard oven took 4 hours to do the job. I am looking for a firm who does large s

Re: Stupid follow-up

Electronics Forum | Fri Aug 21 07:57:20 EDT 1998 | Earl Moon

Will somebody please explain HASL (here). Thanks. Tryin: HASL: Hot Air Solder Leveled. A board fabrication process that applies an oxidation preventing solder coating to copper pads on the board. Dave F You do this to keep the green s

Re: Any help reflow soldering Through Hole parts

Electronics Forum | Mon Mar 09 16:36:38 EST 1998 | Jim McLenaghan

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

Wave solder of TQFPs

Electronics Forum | Wed Jul 19 01:20:17 EDT 2000 | Craig

Does anyone have any experience wave soldering TQFPs. Our R&D is wanting us to do this but we (production) are hesitant. I've found some recommended pad designs and solder theiving designs in a Philips app note "SMD Mounting Methods". The theory look

Power problem on radio circuit

Electronics Forum | Mon Sep 16 12:56:56 EDT 2002 | dragonslayr

simon- davef is on the right track. 1st year electronics courses teaches us that you should always check the power supply first. In this case, the power supply in question is not your power source but the regulated power within the unit. I suspect o

SM Headers & Connectors

Electronics Forum | Tue Apr 07 15:05:58 EDT 1998 | Bob Barr

Is it just me, or does anybody else have problems with open connections on small surface mount headers and connectors? I am talking about small 20 to 40 pin devices, 25 to 50 mil pitch. We put these things on the board, the feet look like they are

PCB Design Question - Hard gold or ENIG for keypad button contacts

Electronics Forum | Fri Feb 17 07:23:29 EST 2017 | sevenfortyone

I'm a PCB designer working on a board that has a rubber keypad with control buttons mounted to it. The PCB contains the corresponding contact patterns for the buttons - a typical interlocking finger pattern. In the past when I've encountered this

Re: Selective Soldering wih Drag Machine

Electronics Forum | Mon May 25 23:26:19 EDT 1998 | Jon Gruett

I agree with Mike. They are a dead issue. As a manufacutrer's rep for many types of equipment and 11 years in the engineering field I have seen several attempts to revive the technology (if you can call that technology). Most if not all attemptds


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