Electronics Forum: pass (Page 114 of 150)

Re: Fiducials

Electronics Forum | Fri Feb 19 11:28:51 EST 1999 | Steve Gregory

Hi Bob, I know what you're talking about, it seems that most machines that I've worked with, have at one time or another some problem seeing a fiducial. Some machines are worse than others, and it really didn't make a difference what kind of vi

Re: Fiducials

Electronics Forum | Fri Feb 19 11:29:05 EST 1999 | Steve Gregory

Hi Bob, I know what you're talking about, it seems that most machines that I've worked with, have at one time or another some problem seeing a fiducial. Some machines are worse than others, and it really didn't make a difference what kind of vi

Re: Good Solder Joint Failures

Electronics Forum | Mon Feb 15 17:57:01 EST 1999 | Earl Moon

| Hope some of you out there can help me with this one. | I am getting feedback from our test department that they are showing opens on solder joints which have visually good wetting. The touch-up operators confirm that the joint looks good. All they

Re: Good Solder Joint Failures

Electronics Forum | Tue Feb 16 12:14:12 EST 1999 | Gregg Reick

| Hope some of you out there can help me with this one. | I am getting feedback from our test department that they are showing opens on solder joints which have visually good wetting. The touch-up operators confirm that the joint looks good. All they

Re: Selective Wave Solder Palletizing

Electronics Forum | Mon Feb 08 17:11:04 EST 1999 | chris arnold

| I realize it's been discussed many times before. I need to know your opinions, experience, and knowledge concerning "today's"/latest and best pallet designs, suppliers, and methods for using them more effectively. Earl, Pallets can be extremely u

Re: white residue

Electronics Forum | Wed Jan 27 21:02:53 EST 1999 | Dave F

| i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated temperatu

Re: white residue

Electronics Forum | Thu Jan 28 08:58:10 EST 1999 | Peet

| | i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated tempe

Re: Cooling

Electronics Forum | Sun Jan 24 19:53:54 EST 1999 | Steve Gregory

| It has been known that sufficient cooling after soldering is important in order to get a stronger joint during its solidification stage. And it has been so much emphasised with reflow oven. But, why many models of wave soldering machine do not come

Re: Assembly of CSP on pads with vias.

Electronics Forum | Sat Jan 23 16:31:09 EST 1999 | Steve Gregory

| Hi Everyone, | We plan to build, for reliability/experimental/research purpose some CSPs (namely Tessera microBGA 46-I/O 0/75mm pitch and TI 64 I/O 0/8 mm pitch). the various factors that we plan to evaluate are the reliability and assembly concern

Re: pc design/layout software

Electronics Forum | Thu Jan 14 22:19:34 EST 1999 | Chris G.

| I need to buy modestly priced pc layout software for very infrequent use for very simple microwave and analog surface mount multi-layer boards. Can any one recommend a software package which is easy to learn, runs on a Windows PC and interfaces wit


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