Electronics Forum: pre solder pasted pcb (Page 9 of 134)

Jetprint solder on PCB boards

Electronics Forum | Thu May 27 16:29:26 EDT 2010 | jlawson

Milara has released a inline stencil printer with jet printer in same machine - combi functionality. Not as fast in terms of jetting speed as mydata (uses Asymtek jet head) Can print only, jet only or both to say top up paste on certain areas after

lead coalescence in solder joint

Electronics Forum | Wed Jan 30 08:30:33 EST 2002 | seto

Hello Dave, Mechanically the conection between the component pad and PCB pad is good (the solder joint is very strong). The problem is associated with poor contact after the use by the customer (vibration, temperature, etc). You can see the pictures

stencil/printing machines for solder paste

Electronics Forum | Wed Feb 25 21:47:24 EST 2015 | dinhhuunam

Hi Marshall Bartel, SJ INNOTECH Printer is Best solution & Service for you ! HP-520S/HP-620S/HP-760S/HP-1000S Printing (±0.0125mm) Repeatability (±0.01mm) 0.3 Pitch QFP, 0402 Chip, Ø0.2 MBGA Speed/pressure control by printing section (5 sections) V

No-Lead solder defect - No solder on pads

Electronics Forum | Tue Dec 23 11:55:37 EST 2003 | Marc Simmel

Details, details: 1) The metal shell is part of the component body. The base metal is austenitic stainless steel (304) that has been plated with 90/10 tin-lead over nickel (semi-bright). 2) The entire part (leads and shell) is elevated by the mass o

Re: vibration during solder reflow

Electronics Forum | Sun May 23 07:13:56 EDT 1999 | Scott Cook

| Has anyone had any experience or data using vibration during the reflow process. | We introduced a vibration device attached to the fixed rail on a Vitronics reflow oven. The reason was to prevent skewing on large PLCC devices. The process worked v

solder black stains after reflow

Electronics Forum | Wed Sep 26 12:16:44 EDT 2012 | bwjm

Hi Guys,recently i am facing an issue. Refer to the attached photo. This PCB is high RF speed, gold immersion single layer. After reflow, my solder seems to have black stains on it. I tried with SAC305 paste water soluble and no-clean, both results a

Bump printing with solder paste

Electronics Forum | Thu Aug 19 15:49:05 EDT 2004 | pjc

Hi Erhard, Go to http://www.globalstencil.com They are the stencil firm that worked with MPM for developing technology for printing with thick stencils that are milled out on the bottom to account for existing components on the top side of a PC boa

Re: Void in solder bump

Electronics Forum | Sat Jan 16 03:06:36 EST 1999 | Wirat S.

| | Our spec on voids is 30% ball diameter in the center. On the component to ball and pad to ball interface, we use 25%. To determine this spec, we asked around. I don't know of any studies that have been done to verify if this is OK | | | | Regard

Mixing no-clean solder with activated

Electronics Forum | Mon Jun 18 17:41:07 EDT 2001 | genny

Hi, I put this on the technet forum, and I know some of the same people are here, but I thought I might catch others here as well. We have PCB's which are populated at the CM level with no-clean solder paste. However in house we use a solder wire s

solder ball after reflow owen

Electronics Forum | Thu Aug 24 15:37:50 EDT 2006 | Chunks

Hi Any, This is from an earlies thread "Solder Ball After Reflow Process". Date: August 16, 2006 01:52 PM Author: Russ Subject: Solder Ball After Reflow Process Oven settings are meaningless here. What does the board see? It is the paste we a


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