Electronics Forum | Sat Jun 06 09:53:59 EDT 1998 | Earl Moon
GEOMETRIC DIMENSIONING AND TOLERANCING (GDT) Using and applying GDT to printed circuitry and assemblies is very much like applying it to any other design for manufacturing (DFM) or design for assembly (DFA) requirement using concurrent engineering (C
Electronics Forum | Fri Dec 06 12:24:03 EST 2002 | Mike Konrad
Military and most commercial standards requires post-soldered boards to measure less than 10 �g/in of NaCl (14 when using an Omegameter, 20 on a Ionagraph, and 37 on a Zero-Ion). As Dave stated, 6.5 �g/in of NaCl is called out in Mil-P-55110 for ba
Electronics Forum | Thu Nov 13 17:18:11 EST 2003 | davef
First, don�t get distracted by �OA� and �NC� formulations. This is nomenclature. We want to discuss the issue of �activity�. J-STD-004 "Requirements for Soldering Fluxes" classifies fluxes by their chemical composition, activity level and halide c
Electronics Forum | Mon Dec 23 13:18:04 EST 2013 | stustu
I'm fairly new to SMT, but highly experienced in other materials engineering areas. But have found the definitions/specifications for pastes to be both confusing and inadequate. I have often see graphical representations of the "desired" thermal pro
Electronics Forum | Wed Mar 03 20:20:30 EST 1999 | Earl Moon
| We have recently had problems with bare boards coming in too thick. I would like to know how to properly specify the minimum and maximum thickness using the 13949F and IPC 4101 specs. (We currently use "MATERIAL: GFN 0620 C1/C1 A2A per MIL - P - 13
Electronics Forum | Wed Oct 07 06:19:30 EDT 1998 | Charles Stringer
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Thu Oct 08 22:06:44 EDT 1998 | Eric R
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Tue May 05 15:45:37 EDT 1998 | Dave F
| Looking to buy used or new tubes, that will fit an SOIC-16 | Need these tubes ASAP. We need to bake these parts and drypack. | Please email or call if you can help. | Eric Jenkins | 801 956-0897 Eric I'm not sure of the manufacturer of the parts th
Electronics Forum | Wed Feb 25 09:22:53 EST 1998 | Earl Moon
PCB Fabrication Supplier Evaluation And Qualification Made Easier Supplier evaluation and qualification often is left to uninformed industry references or vague suggestions made by sales unprofessionals. This discussion is met to enhance a customer'
Electronics Forum | Wed Feb 25 09:21:05 EST 1998 | Earl Moon
PCB Fabrication Supplier Evaluation And Qualification Made Easier Supplier evaluation and qualification often is left to uninformed industry references or vague suggestions made by sales unprofessionals. This discussion is met to enhance a customer'
