Electronics Forum | Wed Oct 02 20:59:23 EDT 2002 | davef
We�ve been stewing on this and it just dawned on us the part that�s missing. Blow-holing is caused by BOTH of the following: * Moisture absorption by the resin that holds the board together. [Steve is addressing this with his various baking schemes
Electronics Forum | Fri Mar 16 08:38:40 EST 2001 | ctech
C-Tech is the 8th fastest growing company in New Jersey, yet we are so small and can not afford to buy expensive assembly equipment. Currently in production, we have 8 different through-hole boards and 1 surface nount board. In the past we have had
Electronics Forum | Fri Mar 16 08:51:24 EST 2001 | ctech
C-Tech is the 8th fastest growing company in New Jersey, yet we are so small and can not afford to buy expensive assembly equipment. Currently in production, we have 8 different through-hole boards and 1 surface nount board. In the past we have had
Electronics Forum | Sun Aug 11 22:28:07 EDT 2002 | jersbo
a: charges are typically set by how many different part numbers you have(setup).. and how many placements there are(ie number of locations parts are to be placed) if there are 3 machines inline that does not matter.. its the amount of parts placed an
Electronics Forum | Fri Oct 15 09:11:39 EDT 2004 | mattkehoe
Hi Justin, Thanks for the feedback. We are inspecting with the naked eye. Most of what we do are prototype quantities, in this case 6 pcs, so AOI or measurement equipment has never seemed justified. The release looked uniform during the printing a
Electronics Forum | Thu Nov 11 02:59:03 EST 2004 | Base
Hi Charlie, In case you're processing large quantities of lumileds you may want to have a look at the Assembleon FS machine. It is an FCM machine of only half the length with some dedicated robots on it. In stead of all Pick&Place robots it 2 dispen
Electronics Forum | Tue Sep 15 06:16:35 EDT 2009 | geb
Hi, We're using solder paste opposed to solder wire for hand soldering certain components. We are also using high temperature soldering irons with 450deg C tips as we are soldering onto aluminium (IMS) PCBs. The quantity of tips which we go through
Electronics Forum | Mon Jan 13 16:24:15 EST 2003 | russ
Youch! I know this is going to sound stupid but.... I have done it in the past in limited quantities. We placed capton (polyimide) tape at each of the four corners for a similar situation. It did work but the operator has to be careful in placing
Electronics Forum | Fri Oct 04 11:34:42 EDT 2002 | Bob Willis
Some additional comments from a paper may be of interest. Baking Printed Circuit Boards - Why and How Baking printed boards prior to conventional and surface mount assembly should not be necessary. Often boards are baked for historical reasons; in
Electronics Forum | Mon Aug 17 02:50:44 EDT 1998 | Bob Willis
| Have an SRT w/preheat, 18 layer board all copper, 456 BGA needs to be removed and replaced. The manufacturer is Chip Express and during reflow it warps up or down. Causing either opens or shorts on the corners. I was using gel flux with multiple
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