Electronics Forum: bent pcb (Page 2 of 4)

Minimizing Board Warpage During Reflow

Electronics Forum | Tue Jun 02 20:26:17 EDT 1998 | Anthony

Does anybody know if a contraption exists that will minimize a PCB's tendency to become slightly bent after reflow? We have a new product that we're planning to assemble in a couple of months. The board is 9.7" by 13.4" and it is imperitive that we

TO247 surface mount soldering the tab?

Electronics Forum | Wed Nov 21 16:53:09 EST 2012 | jmelson

We use an LM2575 switching regulator, and have had no trouble reflow soldering it. It is made for that purpose, so no big tab with the bolt hole, and the leads are pre-bent for SMT. Note that soldering the part to the PCB doesn't really give the he

Re: Minimizing Board Warpage During Reflow

Electronics Forum | Thu Jun 11 23:35:40 EDT 1998 | Scott McKee

| Does anybody know if a contraption exists that will minimize a PCB's tendency to become slightly bent after reflow? We have a new product that we're planning to assemble in a couple of months. The board is 9.7" by 13.4" and it is imperitive that

LQFP128 doesn't work when cold

Electronics Forum | Tue May 30 13:50:40 EDT 2006 | Dragan

Hi, I ran into a problem and need a solution. It is a 3cm*4cm*1mm 2 layer PCB (6x6 panel) with a LQFP128 package Microcontroller, a resonator and 2 capacitors. What happens is: When i recieve the assembled pcbs from the assembly plant they wor

LQFP128 doesn't work when cold

Electronics Forum | Tue May 30 17:17:08 EDT 2006 | Dragan

Hi, I ran into a problem and need a solution. It is a 3cm*4cm*1mm 2 layer PCB (6x6 panel) with a LQFP128 package Microcontroller, a resonator and 2 capacitors. What happens is: When i recieve the assembled pcbs from the assembly plant they wor

PCB and component handling guidelines

Electronics Forum | Fri Feb 18 09:41:44 EST 2000 | James Lewis

Has anyone seen or put together a good collection of proper handling procedures for components and PCB's? I realize a lot of it is no-brainer stuff, but I need some depth for a training class we are putting together. This would include ESD, Moisture

PCB and component handling guidelines

Electronics Forum | Fri Feb 18 09:41:44 EST 2000 | James Lewis

Has anyone seen or put together a good collection of proper handling procedures for components and PCB's? I realize a lot of it is no-brainer stuff, but I need some depth for a training class we are putting together. This would include ESD, Moisture

Re: Minimizing Board Warpage During Reflow

Electronics Forum | Wed Jun 03 07:02:25 EDT 1998 | Earl Moon

| Does anybody know if a contraption exists that will minimize a PCB's tendency to become slightly bent after reflow? We have a new product that we're planning to assemble in a couple of months. The board is 9.7" by 13.4" and it is imperitive that

forming axial-lead for elavated horizontal soldering to SMT pad

Electronics Forum | Wed May 26 05:05:04 EDT 2004 | curious

hi, we have a batch-rework for a axial 2-lead LED component. we are thinking of bending both ends of the axial-leads into a L-shape at 90degree angle, and solder the flat-end of the L-shape flatly to the PCB's SMT pad. hope the experienced guys/exp

Open BGA joint

Electronics Forum | Wed Sep 15 17:31:40 EDT 2004 | GS

Once you verified for correct profile ( consider CTE mismatch) make sure before you remove PBA from fixture, the temperature is almost at room temperature. If by removing PBA from fixture,and the PBA gets a little bent (warped) just in the area where


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