Electronics Forum: 3

Step by step guide in evaluation of Solder Bar and Flux

Electronics Forum | Mon Dec 11 20:44:37 EST 2006 | davef

Title : LEAD-FREE WAVE SOLDER FLUX EVALUATION Author : Michael Havener Author Company : Benchmark Electronics, Inc Date : 09/25/2005 Conference : SMTA International Abstract : The European Union�s deadline to ban lead in electronic pr

Best way to fan-out 0.5mm pitch BGA for fastest prototyping

Electronics Forum | Wed Nov 23 19:50:23 EST 2016 | gmscribe

Hi guys, I'm working on a design involving a 223-pin BGA with 0.5mm pitch (ball size 0.3mm) with a 16-bit DDR3 controller involved. Currently routing a track between two balls is resulting in a track width of 0.1mm and a spacing of 0.077mm. Now the

problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 09:57:44 EDT 1999 | Vic Lau

Dear guys, I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are now using a no

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 10:11:33 EDT 1999 | Dave F

| Dear guys, | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are now usin

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 16:19:46 EDT 1999 | Kennyv

| | Dear guys, | | | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are no

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 16:23:18 EDT 1999 | Kennyv

| Dear guys, | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are now usin

Re: Wave Solder Flux Weight

Electronics Forum | Tue Jan 18 08:40:42 EST 2000 | Dave F

Hey John: Chrys wrote a good description on calculating flux density a while back. Here is our version of her procedure: 4.3 Determine the amount of flux on the board. 4.3.1 Get a piece of corrugated cardboard and a weighing scale accurate to 0.01

Excess Flux in uBGA rework

Electronics Forum | Tue Sep 25 14:38:05 EDT 2001 | nwyatt

1. SRT has been recently calibrated - problem is too many hands in the machine and careless mistakes. The profile is good and has been recently checked by a fellow from Genrad. 2. We are relying on the left over solder from the previous joint and

Re: Passive SMD components codification

Electronics Forum | Thu Feb 17 22:30:09 EST 2000 | Dave F

Alberto: There's no rules, but it works sorta like this: RESISTORS Usually marked in ohms using a standard code: First two numbers is the value Third number is the multiplier 102 = 1.0 x 10� ohm = 1000 ohm = 1 kW CAPACITOR Usually not marked. When

Re: Passive SMD components codification

Electronics Forum | Thu Feb 17 22:30:09 EST 2000 | Dave F

Alberto: There's no rules, but it works sorta like this: RESISTORS Usually marked in ohms using a standard code: First two numbers is the value Third number is the multiplier 102 = 1.0 x 10� ohm = 1000 ohm = 1 kW CAPACITOR Usually not marked. When


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