Electronics Forum: plcc (Page 1 of 29)

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 05:43:09 EDT 2005 | plcc

Does anyone come across the problem of pcb turns yellowish color after going thru' reflow under ROsH condition?

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 20:22:43 EDT 2005 | plcc

Hi Ktron, I'm still waiting for my supplier to get back to me on the type of finishing. Usually what type of finishing is recommended for reflow under ROsH condition?

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 20:25:39 EDT 2005 | plcc

Hi Davef, I'm suspecting that too! The recipe we are using is the optimum for good soldering results. I'm checking with our supplier on the type of pcb material. Do you know the recommended material for pcb undergoing reflow, under ROsH condition?

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 21:43:23 EDT 2005 | plcc

Hi Davef, After reflow, the pcb board turns yellowish color. However, the board still pass thru' functional test.

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 22:51:39 EDT 2005 | plcc

Hi Davef, The whole laminate turns yellowish.

PCB cosmetic reject after reflow

Electronics Forum | Tue Aug 09 20:51:58 EDT 2005 | plcc

Hi Davef, I've found it. Very useful info. Thanks a lot.

COB Costing

Electronics Forum | Wed Aug 17 21:58:35 EDT 2005 | plcc

Does anyone familiar with COB process? I hv a PCBA product with one of the photodiode (size 26mmx1mm) which needs to be bonded directly on the pcb using COB technology. The wires that need to be bonded are 2, goldwires for about 100microAmp current.

PCB SolderPad Yellowish

Electronics Forum | Mon Sep 05 01:38:12 EDT 2005 | plcc

I hv a PCB (mtrl is RF35). After going thru' reflow, we found yellowish stain on the solder pad (solder mask). It looks like burn-marks. The reflow temp use is 245oC. We tried running bare pcb under 220oC, there's minimum stain found (acceptable),how

Matrix Trays

Electronics Forum | Tue Apr 04 09:14:57 EDT 2000 | M Cox

ISO a source for Matrix Trays For plcc20, plcc28, plcc44, etc thanks Mike c

PLCC parts

Electronics Forum | Thu Oct 12 04:48:54 EDT 2000 | Marc

Does anyone know where I can get waffle trays for a PLCC44 package???

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