Electronics Forum: yellow color on hasl (Page 1 of 1)

White spots on PCB

Electronics Forum | Fri May 11 15:43:41 EDT 2001 | davef

More information would be helpful. For instance: * Talk about the distribution of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about the board (ie, thickness, type, solder ma

Stain on PCB from reflow oven

Electronics Forum | Fri Apr 16 12:47:48 EDT 2010 | boardhouse

White solder mask does have a tendency to yellow within the lead free environment. so double coating will not help any. I due believe the flux is a factor in the yellowing but due to the color is the main reason. Find out what brand of S/M mask they

Re: Adhesion loss on passives over wave

Electronics Forum | Fri Mar 19 11:01:42 EST 1999 | Dave F

| Hi folks, | | I am looking for inputs on a long-standing problem encountered in our shop: Bottom-side parts (passives) falling off in the Wave...where the only remnants of the part is a flattened glue dot of proper diameter and volume, and somet

Solder Joint Discolouration

Electronics Forum | Thu Jan 10 02:16:09 EST 2019 | ameenullakhan

Hi Steve, Thanks. This from the trusted supplier. HASL finished PCB. Even PCB supplier is using the water wash flux for fabrication. Its almost eliminated with N2 environment. And we had got a expert view from Dr. Lee of Indium on the issue st

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