Electronics Forum | Thu Jun 07 05:11:42 EDT 2012 | cp38260
Hi, I have pcbs (Duroid/RT 5880) with raw copper, soldered in vapour-phase chamber at 230 degrees Celsius. During soldering, copper gets tarnished. Cleaning with Vigon A250 removes the tarnished layer. Indeed, in the VigonA250 techn. datasheet it is
Electronics Forum | Tue Apr 24 09:19:51 EDT 2018 | vetteboy86
Is there a preferred method among printed circuit board assembly for accurately and quickly verifying the copper weight of a printed circuit board? I would like a tool and process that our quality inspector could quickly use to verify upon receipt of
Electronics Forum | Mon Sep 09 21:54:01 EDT 2013 | mandysmile
Hi, rod, The exposed copper area you could do with ENIG. It is with good solderability.
Electronics Forum | Fri Jun 18 13:48:37 EDT 1999 | Earl Moon
| We currently use HASL on all of our boards and I would like to move to something else. I have sampled some boards with Entek OSP and I loved it, the problem is we have plated mounting holes on just about every board we make. Does anyone have info
Electronics Forum | Fri Jun 18 12:50:32 EDT 1999 | jseagle
We currently use HASL on all of our boards and I would like to move to something else. I have sampled some boards with Entek OSP and I loved it, the problem is we have plated mounting holes on just about every board we make. Does anyone have inform
Electronics Forum | Mon Oct 21 11:49:20 EDT 2002 | sueph
Mike, We are currently wave soldering several assemblies with with a lot of ground plane. The soldering handbook we have in house suggests a preheat temp for metal core multilayer boards of 230 to 270 degrees F' (110 to 130 C'). It was scary at fir
Electronics Forum | Sun Oct 20 19:42:29 EDT 2002 | sjpence
Like Russ, I am also curious about the 100% fill requirement. On any thick, high mass board the key is getting as much heat as possible into the board. If you get the board to the proper temperature, solder will flow just about anywhere. As an alte
Electronics Forum | Fri Jul 10 07:34:00 EDT 2020 | elijah
From the poor bonding strength of the board, the surface quality problems of the board are divided into: 1. The cleanliness of the board surface; 2. The problem of micro graphite (or surface energy) on the surface. PCB circuit board proofing Youke bo
Electronics Forum | Wed Sep 20 19:43:06 EDT 2000 | Dave F
Some RF components are made in copper in weird spiral and parallel strip-line shapes. I'd either: * Send the boards back to where ever you got them and tell that bird brain to use SM-782 pads and practices. ... OR * Get the bird brain that sent you
Electronics Forum | Thu May 02 07:11:10 EDT 2002 | davef
They probably the same. Most likely someone is saying immersion gold [immersion Au] as a short hand for ENIG [ Electroless Nickel - Immersion Gold]. It is very uncommon to plate gold directly on copper, because gold and copper form a brittle interm
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