Electronics Forum | Wed Nov 10 16:19:51 EST 2010 | davef
The 5 thou standoff of your SOIC is probably the minimum. We wouldn't be surprised to see 10 thou. With this, you could have maybe a 6 thou gap between printed solder paste and the bottom of the heat slug. So, you're expecting the rabbit ears of p
Electronics Forum | Wed Dec 19 01:17:13 EST 2001 | ianchan
Hi Experts, I need help here, advice appreciated from all... Production is running a Lot of flex-circuit PCB, through the SMT line, with 0402 components. The flex-PCB is taped to FR4 support "pallets" when processing thru' the SMT P&P m/c. We use
Electronics Forum | Mon Jul 29 09:19:00 EDT 2002 | pjc
Quick Change Tooling is one advantage for DEK when comparing the MPM UP2000. DEK has Form Flex. Good system, but I've heard concerns about long term dependabilty. All support tooling options offered on the UP2000 takes a bit of time to set up. So, If
Electronics Forum | Tue Nov 01 12:33:26 EDT 2011 | davef
snip Dear Reader, Five years of ground-breaking innovation at blazing speeds in the realm of flex circuits has culminated in the publication of Flexible Circuit Technology, 4th Edition. Joseph Fjelstad, a world-renowned expert in the field and a 40
Electronics Forum | Tue Mar 02 17:26:24 EST 2004 | pjc
I worked on MicroFlex. All axis move via electric motor drive. Carraige reapatability is +/- 0.0005" (12 micron). Cameras position more easily on linear bearings than the swivel type. The alignment accuracy and repeatability easily supports sub-20mil
Electronics Forum | Fri Feb 28 12:02:15 EST 2003 | MA/NY DDave
Hi You are right. I guess some of us missed this point in the way this on line dialog works. I like to put the specification that the PCB supplier must adhere to, on the Physical Print. The Physical print is often used by outgoing and incoming insp
Electronics Forum | Mon Dec 29 08:54:46 EST 2003 | pjc
SPM is superior. SPM has larger print area, up to 20� x 19", vs. 17.7� x 15.7� for the UltraPrint 100. UP100 is microprocessor controlled while the SPM has a PC. The SPM cameras can be positioned more rapidly and with greater accuracy than UP100's.
Electronics Forum | Tue Sep 05 16:26:53 EDT 2006 | Bill
Thinking about this auto-mode on Grid-Lok..... Ok, the board is warped, lets say positively, the pins conform to the warped board... what about the effect on top side and squeegee pressure? It will be much higher and could damage stencils, right? Pos
Electronics Forum | Sun Dec 17 14:49:57 EST 2006 | kvanzill
Well, We have several lines some products run Kester 256 and others run the Timura. I have changed the product to print on another printer and it follows. We have several products that use the same paste and similiar board design that has a problem
Electronics Forum | Fri Jul 07 09:15:23 EDT 2000 | K. Chak
Hi Dave, This particular p/n calls for print&etch for wet process..and the problem occured due to surface contamin. with resist residue resisting copper from etching off. The high pressure nozzle was a problem at developing oper. and it is fixed now
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