Electronics Forum | Tue Oct 22 13:28:03 EDT 2002 | slthomas
Brian, Since the change, I have seen numerous instances of extra zeros being added to numeric values, typically those of 3 (original) characters or more. Case in point, a contribution by our friend Mr. Fish that I have cut and pasted: "The steadfa
Electronics Forum | Tue Oct 22 14:57:18 EDT 2002 | Jim M.
I use a water soluble flux to solder an LCD into gold plated through holes of a .031 circuit card. Problem is the current water soluble flux (850-33) is not made anymore (the drop in replacement has a different formuala and does not work). The main i
Electronics Forum | Mon Oct 28 18:59:25 EST 2002 | tkenny007
Specs for Bow and Twist for PCBs (IPC-A-610C, 10.6. There may be an update by now). I also have a note in our quality guide referencing (IPC-TM-650, 2.4.22) and (MIL-STD-105D). In summary, a PCB should not bow more than 0.040" with all four corner
Electronics Forum | Fri Nov 22 17:55:39 EST 2002 | robertorre
Your problem may be related to different aspects. 1. Oxidation on landing pads. 2. Either high(To long over liquidous temp) or low temp. 3. Bad solder (not enough vehicles) Run this test: Set a hot plate to 220 degrees C. Make sure you have proper ve
Electronics Forum | Mon Nov 25 20:57:23 EST 2002 | Kermit
Thanks to everyone who has responded so far. We are going with dedicated tooling for our phone cards but not for our system cards so that takes that out of the equation for the former, will evaluate for the system bds.. Thanks for the info.. Regard
Electronics Forum | Fri Nov 22 10:18:33 EST 2002 | Joaquin Rodenas
Dear Mr. Liang I'm a service ingeneer in a distributor of FUJI products. My first suggestion is get some help from the FUJI dealer in your territory, but anyway try the following: First of all, check again the FTP tool included in F4G-main windows
Electronics Forum | Thu Nov 28 09:51:37 EST 2002 | davef
I got here before the experts did. Underwriters Laboratory Incorporated is an organization located in the United States and is purely concerned with product safety performance. UL operates laboratories for the investigation of materials, products,
Electronics Forum | Thu Dec 12 09:21:42 EST 2002 | blnorman
What we did: *Slump-dot diameter and height as a function of time *Print Speed-Vary speed, measure slump and missing/defects *Green Strength-We quantifiably measured tack vs time and we placed components and measure skew by SVS *Cure profile sensitiv
Electronics Forum | Thu Dec 19 11:30:11 EST 2002 | russ
What temp. are you planning on baking them? If this is long term process I would recommend that you hav trays made out of an appropriate ESDS material that can withstand your bake temp (such as duropol)for your QFPs. You can have several patterns/pa
Electronics Forum | Mon Dec 30 01:52:13 EST 2002 | MA/NY DDave
Hi I see DaveF already gave some good stuff. You should read or at least review some of the texts he listed or some others in the same subject areas of SPC (Statistical Process Control) or DOE (Design of Experiments). I won't list the other publish
