Industry News | 2019-05-16 01:27:23.0
There are several surface treatment for PCB board: bare board (no treatment on the surface), rosin board, OSP (Organic Solderability Preservatives), HASL (lead tin, lead-free tin), plating gold, immersion gold, etc., these are relatively conscious treatment. Many people can't tell the difference between plating gold and immersion gold, thinking that it is the same thing, it is a big mistake. The following is a brief introduction to the difference between plating gold and immersion gold.
Electronics Forum | Thu Jul 31 15:41:23 EDT 2003 | davef
Q: Could any of you guys tell me what exactly is this greenish thing ? A: No, but is not copper oxide. Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board. Many copper salts are greenish in
Electronics Forum | Mon Aug 29 08:44:57 EDT 2016 | jrrt_williams
As an OEM repiar tech I would run into "Black Pad" on occasion, though mostly on surface mount pads. The only way I could remove the oxidation was to apply water soluble flux and add solder, then wick away the excess. This left me with a suitable s
Electronics Forum | Fri Jan 23 13:26:34 EST 2009 | bwet
Dear SMTers: We are looking for a supplier of 1 oz copper sheets, tin coated on one side and black oxide coated on the other? Ideas? BWET
Electronics Forum | Fri May 23 23:47:46 EDT 2008 | dint46
Wayne; Several things. 1.check the vendors and see what black oxide they are using are they the same ? It might be that. 2.You should bake your pcbs before the thermal stress is applied. To remove moisture. At your shop. The proce
Electronics Forum | Thu Mar 02 07:40:46 EST 2000 | Roni Haviv
Allmost forgot: The "black pad" is simply the oxidized Nickel.
Electronics Forum | Thu Mar 02 07:40:46 EST 2000 | Roni Haviv
Allmost forgot: The "black pad" is simply the oxidized Nickel.
Electronics Forum | Wed Jul 28 20:14:22 EDT 1999 | Dave F
| While inspecting incoming PCBs we detected around all plated-through-holes (only there and all in the same place) some halfmoonshaped light rings that match obviously only with the pink ring symptom shown in the IPC-A-600 chapter 2.5.2.. That would
Electronics Forum | Tue Apr 14 09:38:07 EDT 1998 | Earl Moon
| We are having some difficulty soldering a 240 pin Altera device. We use Alpha WS-609, a very generic profile for that solder paste, and a 6 mil stencil with laser cut apertures (1:1 ratio). This is a 20 mil pitch device (aperture size is 10 mils X
Electronics Forum | Thu Apr 19 02:49:07 EDT 2007 | ray
I observed some black dot or some oxidation occured on chip termination on pcba reflowed fews weeks ago as buffer stock. The solder joint and fillet wetting is good and shinning. It is an acceptable or defect condition per IPC standard/requirement? W
