Electronics Forum | Wed Mar 11 09:06:06 EDT 2009 | lococost
No, it's not. Bottom components will reflow regardless of bottom side heaters.
Electronics Forum | Tue Apr 10 14:35:52 EDT 2007 | UT
We are in middle to prototyping a lead free assembly for one of our customers. We are using lead free bare PCBs, consumables and components, except for two ICs which are leaded per the customer BOM. Will the overall assembly be defined as lead free p
Electronics Forum | Tue Apr 17 02:42:58 EDT 2007 | Wayne
Obviously, it is not considered the ROHS compliance product already. One or few components are not ROHS, how can it be ROHS product? If it is agreeable by your end customer, you should list down the part which are using leaded product before hand, at
Electronics Forum | Mon Mar 09 11:43:59 EDT 2009 | pcbrown
Here is a formula that may help. C/P C= Component's weight in grams P= Total pad area in Sq. in. Must be less than or equal to 30 Parts larger than a 68 pin PLCC should use an adhesive. Hope this helps.
Electronics Forum | Fri Mar 13 03:49:27 EDT 2009 | nagesh
Thx a lot brown.Well this worked out better. earlier i had tried using a heat resistant tape on the component ended up with issues. Thx Nagesh
Electronics Forum | Wed Sep 11 07:37:11 EDT 2002 | mk
Whoaaaa Genny, Its not that bad!!! The difficulty factor is in assembling your own boards is all releative to how many, and how difficult they are. Most studies show that the vast majority of defects in smd assembly are generated in the application
Electronics Forum | Tue Apr 10 17:44:50 EDT 2007 | Anon Y. Mous - Senior SMT Superczar and Process Guy
One of our customers had us building "Pb-free" assemblies with a few Sn/Pb parts on them. THEY got rolling too slowly and we were not able to bring in the required Pb-free components due to lead-time (not Pb-time) issues. When they started requesti
Electronics Forum | Thu Sep 12 14:48:15 EDT 2002 | stepheno
I found the article online that I was talking about. It was in Cirucuits Assembly. http://www.circuitsassembly.com/mag/0205/0205cmac.html I found the artcile quite interesting
Electronics Forum | Tue Feb 06 18:12:46 EST 2001 | davef
Pete makes great points. Taking a slightly different angle, use your placement equipment's software to help you. It keeps track of the number of picks and attempts for each location. Study these numbers for a week and determine the capability of p
Electronics Forum | Wed Jan 10 04:39:42 EST 2018 | smtspareparts
Obviously the cost difference between only smt and smt+th is huge though TH only 1 components,they need different material,machines,tools and control methods,so if possible just use only smt process to assemble all components,but to verify if the usb
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