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What are the six types of bad solder connections?
Six types of bad solder connections include a cold joint with insufficient wetting (Pin) or insufficient wetting (Pad), a disturbed joint, an overheated joint, too much solder, or not enough solder.
What is a poor solder joint called?
A dry joint
What is a bad solder joint?
A soldered joint that was done poorly.
Do soldered joints have too high a resistance?
Soldered joints will have a higher resistance if the joint is not a clean solder joint. Badly soldered joints are classed as a cold solder joint. <<>> ...for what? Application matters here.
What should be prevented prior to the solder cooling in order to to get a good shiny solder joint?
Movement. The components being soldered need to be fixed, stable, and clean to allow the solder joint to solidify and adhere properly. Movement of components will cause a 'dry' joint which will be electrically unreliable and have a dull appearance.
What are the characteristics of a good solder connection?
The surface of the solder on the connection you are soldering should be bright and shiny. A cold solder joint will not be shiny, it will have a crinkly look about it. In some cases the joint can be wiggled and it will come apart.
What am I doing wrong when I can't get the solder to stick when soldering a copper pipe?
Not cleaning the pipe or joint enough, not using flux, or not heating the pipe or joint enough. You use the blue tip of the flame on the joint and the capillary action sucks the solder into the joint. You have to clean the pipe with sandpaper or steel wool, the joints with a fitting brush on the inside, and use a proper flux and solder.
Why is using much solder problematic with fine jewelry?
use the smallest amount of solder necessary to make a good joint.
Properly made and cooled solder joint will have the solder?
well wetted round both conductors, and will appear shiny and smooth.
What is cold flow?
It is a term used when soldering with a soldering iron. It means that the solder is not completely up to temperature to make a proper joint. A good solder joint is very silvery in colour and shines when it is done right.
What has the author John H Lau written?
John H. Lau has written: 'Solder joint reliability of BGA, CSP, flip chip, and fine pitch SMT assemblies' -- subject(s): Testing, Multichip modules (Microelectronics), Reliability, Solder and soldering, Microelectronic packaging 'Solder Joint Reliability'
What keeps a solder joint clean?
Sand paper or steel wool to clean it and flux to clean the oil or other surface contaminants so that the solder will stick.
