Electronics Forum: dfm and dave (Page 14 of 23)

Re: Land patterns for 0612 and 0508 capacitors

Electronics Forum | Tue Nov 30 17:07:42 EST 1999 | Dave F

Wendy: The IPC-SM-782 Pad Calculator (www.ipc.org/html/fsresources.htm) should be able help you solve your problem. Good luck Dave F

Is there a medical rating and standards for PCB components

Electronics Forum | Sun Aug 04 20:50:33 EDT 2002 | Ron L

Thanks Dave, Is there High and Low grade components !! Do component manufactures issue a certificate with pretested or certified components for the assembly of medical pcbs .

Is there a medical rating and standards for PCB components

Electronics Forum | Wed Aug 07 19:41:34 EDT 2002 | ralugg

Thanks Dave and Steve, Your answers have will close this issue on Medical Pcb assembly and component specifications. your time is greatly appreciated.

Need help on PCBA Cleanliness Standards and Specs

Electronics Forum | Wed Nov 26 12:44:55 EST 2003 | caldon

Dave- Mark Thaler is no longer at ACI/EMPF. He left a few Years Back. Best to use Guy Ramsey gramsey@aciusa.org 610-362-1200 x 107 Cal

"Gap" in completed solder joint between lead and pad

Electronics Forum | Thu Nov 30 14:49:54 EST 2006 | M. Sanders

Dave, Thanks - I couldn't agree with you more. Unfortunately, our "bean counters" have a different frame of mind.

What is the preffered spacing between PTH and SMT pads

Electronics Forum | Tue Apr 28 04:07:56 EDT 2009 | davepick

There's a nice tool on this site - http://www.enhancetechnical.co.uk/ Click on Internet Tools and then the image - brings up a useful interactive tools which helps understand influences on wave solder bridges. Dave

Re: Step down stencils using CBGA and 20 mil QFP's

Electronics Forum | Mon Oct 25 15:23:26 EDT 1999 | Dave F

Ron: You're really talking about a step-up stencil in the area of the BGA. I don't think your problem is a lack of solder, but who know? I think you should do some sections on returned boards from your customer to help determine the source of the

Re: SMT training classes and start up equipment

Electronics Forum | Mon May 04 21:35:25 EDT 1998 | Dave F

| We are just starting out with SMT. I need any and all the information you have. We are looking to start a small to mid range line. Denis, You should pursue the following SMTNet thread on this topic: Posted by Igor Kostyuk on April 22, 1998 at 16:57

Re: Convection Oven and thermo profiling of Circuit Boards

Electronics Forum | Mon Apr 17 19:54:39 EDT 2000 | Dave F

Sounds like a true IR guy to me!!! Your profile should reflow solder on the board properly to produce a reliable product for your customer. If that requires more than one proifile, so be it!!!. That being said, we went from hundreds of IR profiles

Re: paste release from stencil, and volume calculation

Electronics Forum | Mon Nov 15 12:09:55 EST 1999 | Dave F

Steve: Continuing with Dan�s thinking, generally, "poor release" (paste hanging-up in the stencil holes) could have three main (or combination of) causes: 1 Equipment: Stencil is too thick. Specifically, your 0.006 should be OK, providing you don�


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