Electronics Forum: materials (Page 212 of 345)

Re: Thermal Stress in Reflow

Electronics Forum | Tue Aug 31 20:41:45 EDT 1999 | Dreamsniper

| | I am looking for a rule of thumb regarding the maximum ramp standard components (chip capacitors) can tolerate without failure during the reflow process. The standard seems to be 3C\second, but this figure is generally derived from the average r

Re: Titanium finger

Electronics Forum | Mon Jul 19 10:10:38 EDT 1999 | John Thorup

| | | My wavesoldering machine is equipped with Titanium finger. What composition of Titanium alloy used ? Any grade difference, and which is the best grade for long life ? An info or website concerning it. | | | | Dear Barden, | | | | Sorry, I a

Re: The care and feeding of adhesive nozzles

Electronics Forum | Tue May 25 11:31:57 EDT 1999 | Scott Cook

| | | | | | Any suggestions on how to maintain Adhesive dispensing nozzles??? They seem to plug up over night and it is starting to get on my nerves. We have tried leaving the nozzles in the machine, removing them and soaking in alcohol, blowing

Re: The care and feeding of adhesive nozzles

Electronics Forum | Tue May 25 12:19:55 EDT 1999 | M Cox

| | | | | | | | | Any suggestions on how to maintain Adhesive dispensing nozzles??? They seem to plug up over night and it is starting to get on my nerves. We have tried leaving the nozzles in the machine, removing them and soaking in alcohol, bl

Re: Ceramic + Hi-temp solder

Electronics Forum | Wed Apr 21 20:50:26 EDT 1999 | Dave F

| I'm having problems with trying to get a good solder joint using a Ceramic PCB. We are using AMTECH hi-temp solder (ws-486 96.5/3.5ag). My profile looks great and I used the recommended profile from Amtech with a few adjustments. My max temp is abo

Transient Voltage Suppressors

Electronics Forum | Fri Mar 12 11:59:50 EST 1999 | Ray Morford

AVX and a few other companies make these chip transient voltage suppressors (TVS) parts that are a real *PAIN* to use. According to AVX: "Due to the semiconducting nature of the doped Zinc Oxide (ZnO) ceramic material, SMT TransGuards are no

Re: Using SMT to mount rider cards to mother boards

Electronics Forum | Wed Feb 10 18:26:04 EST 1999 | Earl Moon

| Has anyone had any experience in using SMT to mount an organic (FR-4, Getek) rider card onto an organic (FR-4, Getek) mother board? By SMT I mean the attachment of the rider card would be through pads directly to pads on the mother board. | | Than

Re: Dry Storage Options

Electronics Forum | Fri Jan 22 14:24:44 EST 1999 | Dave F

| I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | Michael: Let's take a different angle on this. Why not ha

Re: Dry Storage Options

Electronics Forum | Fri Jan 22 17:38:07 EST 1999 | Michael Larsen

| | I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | | | Michael: Let's take a different angle on this. Why

Re: PCB preservation.

Electronics Forum | Thu Nov 19 11:06:40 EST 1998 | Earl Moon

| We have some PCB�s in our warehouse in Manaus - Brazil. They are stored for more than 2 years , in a condition of 25 degrees centigrades and a humidity ranging from 60% to 90%. | Do these conditions cause the PCB�s to deteriorate over time? If so ,


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