Electronics Forum | Tue Jun 25 11:26:11 EDT 2002 | pdt203
Sometimes when a customer has sent parts on reel without any leader, we will take out the first 5-8 parts and then tie off the cover tape with some leftover tape from the last run. We keep those parts we removed and then place them back in the feede
Electronics Forum | Tue Mar 21 19:34:32 EST 2006 | Tom Smykowski
Omar: I dealt with this so called "hot bar" process also, and you're right; it's neither reliable nor repeatable. The goal was to attach a flex LCD display to another flex circuit. The flex LCD was constructed of resin and conductive silver particl
Electronics Forum | Mon Jul 01 14:46:47 EDT 2019 | assuredtech
It's been awhile but yes, if you do not allow the machine to optimize your program and your placing sequence is such that the tallest component is perhaps the 1st or last placement so it doesn't bump into other components, next is you may look into a
Electronics Forum | Tue Jul 29 08:29:21 EDT 2008 | davef
Beyond the materials cost, one approach to estimating the cost of assembling a board is: 1 Direct cost * Determine the processes required to assemble the board * Separate parts on BOM according to process * Multiply number of parts in each process by
Electronics Forum | Mon Jun 27 09:38:30 EDT 2005 | Bob R.
What problems are the quality people seeing? I hope they aren't expecting a toe fillet. QFNs are typically cut from an array after plating. This leaves exposed copper on the sides of the part. We'll often see smearing from the sawing process that
Electronics Forum | Wed Jun 03 01:06:13 EDT 1998 | Mike Moninger
| We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not al
Electronics Forum | Thu Sep 18 17:11:57 EDT 2008 | realchunks
When looking at surface mount equipment you also have to remember your line pull process. Wil you issue reel of parts or just strips? Most of the bigger machine cannot take strips of parts. What about your set-up? Will you have a dedicated top an
Electronics Forum | Tue May 28 18:31:08 EDT 2019 | jlawson
Solder paste flux is main contributor, Lead termination chemical-oxide by products and PCB Plating-Chemicals. Reflow profile would have very limited if not no impact really unless is way off. Paste volume control and Stencil design plays a big part
Electronics Forum | Thu Aug 09 09:14:22 EDT 2018 | ks0707
Is there any special machines/equipment which are able to install FBGA parts on the very thin flex boards for Printing, Pick & Place, and Reflow ? Q2> Is there any Fixture house who can offer fixtures to enable SMT processes for those assemblies ? Q
Electronics Forum | Mon Jul 25 09:11:25 EDT 2016 | spoiltforchoice
There 2 main rival standards for orientation in tape and because you can't really trust manufacturers to stick to one or the other or something else entirely it is always wise to check the datasheet. Typically an SOIC will have pin 1 the same end as
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