Electronics Forum: solder and a (Page 1456 of 1724)

Re: Solder Paste volume w/reliability data.

Electronics Forum | Tue Jul 27 14:04:38 EDT 1999 | JohnW

| Looking for solder paste specification limits which have reliability data to support them. Currently, we are looking to define the min/max volume necessary to ensure a good joint on CBGA, PBGA, and Micro-BGA's. Any information will be greatly app

Re: castellations vs. no castellations

Electronics Forum | Tue Jul 27 16:30:35 EDT 1999 | Earl Moon

| Can anyone give me the virtues of SMT package castellations vs. no castellations with particular reference to the ruggedness and reliability of the solder joints? Any references or studies that you can point me to? Also, although I'm in favor of

Re: paste in hole

Electronics Forum | Fri Jun 25 12:07:00 EDT 1999 | John Thorup

| | hello, | | | | has anyone tried dispensing solder paste in thru holes instead of waving or hand soldering. if so how did it work out for you. | | thanks for the input | | | | wayne | | | | | | | We have tried this mainly on thru hole connect

Detecting lifted leads on QFPs

Electronics Forum | Fri May 28 07:37:52 EDT 1999 | Steve Cheung

Yes l know this problem keeps cropping up on the forum but l've missed some of the follow-ups. Our problem is that the lifting only occurs on 3% of production so actually detecting an improvement is difficult. We're actually having to inspect 144 p

Re: Is there any good Training Tape

Electronics Forum | Sat May 01 10:04:35 EDT 1999 | Bob Willis

| I would like to know if there is any good training for Hand Soldering, Component Identification, Wave Soldering, and so on. | | I have seen two diffenent tapes and they were short and poorly done, I would like to buy some if I knew it had some goo

Re: Intrusive soldering

Electronics Forum | Tue Mar 23 10:22:17 EST 1999 | Chrys Shea

| Are there many of you who are soldering through hole parts in your surface mount reflow oven? How repeatable is the process? Do you need to touch up a lot after reflow? We don't do long runs maybe 200, 300 boards max. Can you just screen print

Re: Attachment of Flex circuit to rigid PCB

Electronics Forum | Mon Mar 08 17:01:27 EST 1999 | Christopher Lampron

| I need to attach / assemble Flexible circuit onto Rigid PCB without use of any connectors i.e. fingers / tracks of Flexible circuit are to be attached / directly to the fingers of the Rigid Glass Epoxy PCB. | | I need info on the alternate proces

Re: 45 Degree Wave Soldering

Electronics Forum | Mon Feb 22 22:52:32 EST 1999 | Chris G.

| A rash of new products here at my company have designs with multi-pin connectors 90 out-of-phase (orientation)wiht respect to wave direction, which has lead to massive bridging (shorts) problems.... | | Does anyone still use the 45 Degree Pallet

STATISTICAL PROCESS CONTROL. 6-SIGMA

Electronics Forum | Tue Jan 13 08:08:37 EST 1998 | Vanessa Munoz

I have recently been put in charge of our SMT line. We have to developed a SPC. My questions are: q1. What are the �most� important parameters to monitoring and which of the control charts do you usually use depending of the parameter..? Our line is

Mirror image BGA connectors

Electronics Forum | Thu Aug 09 12:36:26 EDT 2001 | Michael Parker

Adam- Mikie here. I too am placing 2 PBGA sockets on an assembly but they aren't mirror imaged. Thanks to the SMT Gods for that one. You say you added more paste to solve for open solder. Do you have x-ray? Were the alignments perfect? Also the part


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