Electronics Forum: amps (Page 7306 of 7890)

Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 12 19:28:26 EDT 1999 | Tom B

Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185 C 4. 1.5 C/s u

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Tue Apr 13 18:11:00 EDT 1999 | Jimmy Strain

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 19 11:21:03 EDT 1999 | Travson

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 19 20:49:13 EDT 1999 | Dave F

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185

Noooooooo, My Fab Guy.

Electronics Forum | Wed Apr 14 12:46:38 EDT 1999 | justin medernach

| | | Thanks all you kind and knowledgeable folks. I no longer will be participating in this forum. | | | | | | After careful consideration, I have come to the conclusion registration, in the manner required to participate in what was an open forum

Re: Noooooooo, My Fab Guy.

Electronics Forum | Wed Apr 14 16:37:47 EDT 1999 | Wayne Bracy

| | | | Thanks all you kind and knowledgeable folks. I no longer will be participating in this forum. | | | | | | | | After careful consideration, I have come to the conclusion registration, in the manner required to participate in what was an open

Re: Surface mounting at the hotel?

Electronics Forum | Tue Apr 13 07:50:47 EDT 1999 | B K

| Hey guys, | We are opening our new shop in a hotel and would like to hear your inputs. We will be providing contract manufacturing as well as equipment sales from this location. It will be mostly for the surface mount side of our business

Re: BENT LEADS ON FINE PITCH

Electronics Forum | Tue Apr 13 04:54:53 EDT 1999 | Charles Stringer

| | DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | | | I use tweezers and picks. I place the component down on it's backside (legs up) and manually twe

Re: BENT LEADS ON FINE PITCH

Electronics Forum | Tue Apr 13 12:36:57 EDT 1999 | Scott McKee

| | | DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | | | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | | | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | | | | | I use tweezers and picks. I place the component down on it's backside (legs up) and ma

Re: The SMT Beginning

Electronics Forum | Wed Apr 07 11:53:59 EDT 1999 | Dave F

| Could somebody send me some information about the SMT Beginning? | I mean, when, where, why, SMT starts. | | Thank you, | | Roberto. | Roberto: There�s lots of reasons for getting into SMT. Some of which follow: 1 Manufacturing engineers thi


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