Electronics Forum: john w. krad

Re: Component staking

Electronics Forum | Tue Jun 06 13:41:16 EDT 2000 | Charles Harper

I would like to refer you to John W. Kratz, author of Chapter 8, as listed at the top of the forum. John is the outstanding specialist in this subject area.

Re: Tombstoning 0805s w/palladium/platinum/silver terminations

Electronics Forum | Sun May 02 18:52:36 EDT 1999 | JohnW

Tombstoning 0805s w/palladium/platinum/silver terminations We are experiencing tombstoning problems on 0805 packages that have paladium/platinum/silver terminations. It comes & goes...... I�ve checked the reflow profile, and paste deposi

Re: DFM/DFT

Electronics Forum | Tue Jan 11 09:47:01 EST 2000 | Dave F

Abbas: Sources of information on DFM/DFT are: � "SMTnet Express" articles on DFM by Earl Moon � IPC-D-279, 'Design Guidelines for Reliable Surface Mount Technology Printed Board Assemblies' � Books in SMTnet and SMTA book stores � Other examples ar

Re: Solder on GF

Electronics Forum | Wed Jul 14 10:58:25 EDT 1999 | Upinder Singh

Hi All, Does any one experienced the solder on gold finger after reflow. Its about 5 to 8 mils diameter . We'd clean the entire screen printer, mounter & reflow as well, but doesn't help much. Mr Kong..... Solder

Adhesive Application by Stencil

Electronics Forum | Tue Mar 27 15:53:13 EST 2001 | johnw

RW, I've been printing glue by stencil for a while. Like the other guy's say there are various method's and material's that you can use but then your printing paste so the ideal is for as little change as possible to the method's your already using.

Adhesive Application by Stencil

Electronics Forum | Tue Mar 27 15:53:14 EST 2001 | johnw

RW, I've been printing glue by stencil for a while. Like the other guy's say there are various method's and material's that you can use but then your printing paste so the ideal is for as little change as possible to the method's your already using.

Re: PTH Cut Form Equipment

Electronics Forum | Wed Jul 14 19:09:54 EDT 1999 | JohnW

I am examining cut & form PTH component prep equipment to help in our manual PTH insertion process. We need the ability to process both axial & radial with snap-in and stand-off capability. Low volume with the ability to feed bulk, T&R, or Stic

Re: Solder on GF

Electronics Forum | Tue Jul 13 19:00:29 EDT 1999 | JohnW

Hi All, Does any one experienced the solder on gold finger after reflow. Its about 5 to 8 mils diameter . We'd clean the entire screen printer, mounter & reflow as well, but doesn't help much. Mr Kong..... Solder on gold is a age old

Re: Solder on GF

Electronics Forum | Wed Jul 14 11:36:56 EDT 1999 | Jimmy Strain

Hi All, Does any one experienced the solder on gold finger after reflow. Its about 5 to 8 mils diameter . We'd clean the entire screen printer, mounter & reflow as well, but doesn't help much. Mr Kong..

Re: QFP solder paste volume

Electronics Forum | Mon May 24 13:33:46 EDT 1999 | Dave F

We are running a number of boards with 8-10 25 mil PQFPs on board. Our process is mature with at least 3 years experiance and statistically few opens on the QFPs. Our beloved purchasing department has chased the almighty $ and changed FAB vendor

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