Electronics Forum: solder web under pcb (Page 9 of 49)

solder question on crystal in DFN style package

Electronics Forum | Mon Apr 05 16:12:16 EDT 2010 | dyoungquist

We are installing via reflow soldering a crystal that has 2 pads, 1 each end. They are flat pads on the bottom of the part with a small area of the pad looping around and up the side of the crystal on the end. Inspection of the cyrstal under a 40X

Where can I purchase a PCB with a bare copper grid for solder flux evaluations.

Electronics Forum | Fri Aug 27 11:27:55 EDT 1999 | Brian

I have looked through the IPC web page and surfed to frustration. Can somebody give me a lead?

Re: Where can I purchase a PCB with a bare copper grid for solder flux evaluations.

Electronics Forum | Sat Aug 28 09:23:36 EDT 1999 | Mike McMonagle

| I have looked through the IPC web page and surfed to frustration. Can somebody give me a lead? | Check out the EasyBraid website below, they carry IPC standard coupons, flux test kits and SIR meters at reasonable prices.

Re: Where can I purchase a PCB with a bare copper grid for solder flux evaluations.

Electronics Forum | Mon Aug 30 16:10:10 EDT 1999 | Dave F

| I have looked through the IPC web page and surfed to frustration. Can somebody give me a lead? | Brian: We don't use an etched board. We use a special stencil, described below and print on bare copper laminate. 3 Solder Wetting Test. Recogniz

Re: STENCILS

Electronics Forum | Sun Aug 02 06:54:26 EDT 1998 | Bob Willis

You may liketo contact Chemtech in the UK. http://chemteck.co.uk as they have a new hand book on stencils and a design guide due for release shortly there is also some stencil information as a survey on types and price on my web sites under surveys h

Re: Green coating and through-hole plating

Electronics Forum | Thu Aug 13 12:55:46 EDT 1998 | Dave F

| Hi, can you please tell me how to make green coating and through-hole plating of PCB? Thanks! | Xingsheng Xingsheng: Welcome. Bible on PCB fabrication: Printed Circuits Handbook, Clyde Coombs, McGraw-Hill Web resources: http://www.pwbrc.org/ a

SOLDER BALL UNDER THE PCB AFTER REFLOW SOLDERING

Electronics Forum | Thu Oct 01 06:44:44 EDT 1998 | PARK KYUNG SAM

Are there anyone who can give me the answer about solder ball problem? We have 12 layer PCB and double sided PCB. After one side reflow soldering We found lots of solder ball under the PCB. The solder ball was coming out from via hole. So when w

Re: BGA In-circuit Failure Analysis

Electronics Forum | Tue Jun 16 15:10:27 EDT 1998 | Bob Willis

Simple x-ray inspection works well have a word with those nice people at Nicolet or Glenbrook. One of them was featured on my x-ray training video for BGA. A procedure for inspection criteria is on my web site if it is of use. | | How do I mechanical

Swatch Group Granted Lead Exemption?????

Electronics Forum | Wed Apr 18 14:14:51 EDT 2007 | flipit

I heard that Swatch was granted their exemption to use lead solder for anything under 800 microns pitch. Is this true? Can't find a thing on the Web stating that this exemption was granted. Chris

Re: Green coating and through-hole plating

Electronics Forum | Fri Aug 14 08:59:51 EDT 1998 | Dave F

| | | Hi, can you please tell me how to make green coating and through-hole plating of PCB? Thanks! | | | Xingsheng | | Xingsheng: Welcome. | | Bible on PCB fabrication: Printed Circuits Handbook, Clyde Coombs, McGraw-Hill | | Web resources: htt


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