Electronics Forum: pictures of pcbs smt circuits (Page 1 of 2)

SMT of Flex circuits

Electronics Forum | Wed Mar 20 07:16:03 EDT 2013 | vinitverma

I have customers populating LEDs on flex PCBs (with Aluminum support plates) with sizes up to 1,200mm (say 4ft) even on old Philips/Assembleon Topaz machines. What components are you planning to assemble on your flex PCBs?

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

Electronics Forum | Fri Jul 23 14:07:52 EDT 1999 | Carl J. Odle

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 a p

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

Electronics Forum | Sun Jul 25 08:54:37 EDT 1999 | Tom Gervascio

| 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: 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

Who of you experts can tell me the history of SMT?

Electronics Forum | Mon Nov 26 20:30:03 EST 2001 | davef

Dirt => Beer => Girls FACT: * Hybrid circuits in the 1960s that were used to conquer space where the genesis of today's SMT. * Japanese commecialized it to build better transitor radios * UIC & Dynapert fought it tooth and nail. UIC finally got t

How actually the process of Electrofoam Stencil?

Electronics Forum | Fri Jan 07 13:17:48 EST 2005 | bschreiber

3) There are several papers on the safety of cleaning PCBs and ICs using ultrasonic technology. The latest is in the October 2004 issue of SMT magazine by William Kenyon, "Why Not Ultrasonics?" Most of the studies have been performed by Dr. B.P. Ri

Re: Tin Immersion (Dexcoat FST) instead of HASL for SMT assembly.

Electronics Forum | Wed Jan 21 03:44:04 EST 1998 | Igmar

| We are currently investigating alternatives to HASL for circuit boards with 20 mil pitch smt pads and below. If you have experience with this product or simular immersion tin products with respect to manufacturing or assembly I am very interested

Re: DFM / DFT information

Electronics Forum | Wed Jul 12 21:42:30 EDT 2000 | Dave F

Hey Jack: What is it with you and the IPC?? ;-) Can use the IPC documents that the IEC "xeroxed" and republished? ;-) Consider: � Vern Solberg is teaching a two day course titled "Printed Circuit Board Design For Surface Mount Technology" at Uni

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