What is the effect that makes components on a circuit board move into place?
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I am going to apologize ahead of time if this is a really simple question. I started learning to solder during my internship but I had no EE knowledge prior.
When I was working with surface mount soldering my internship adviser mentioned this property or effect, the name of which I'm blanking on, that would cause the pieces when heated to move into place on the pads of the board. Does anyone know what the name of that property or effect is?
soldering surface-mount
asked Nov 28 at 17:29
Leigh
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add a comment |
up vote
6
down vote
favorite
I am going to apologize ahead of time if this is a really simple question. I started learning to solder during my internship but I had no EE knowledge prior.
When I was working with surface mount soldering my internship adviser mentioned this property or effect, the name of which I'm blanking on, that would cause the pieces when heated to move into place on the pads of the board. Does anyone know what the name of that property or effect is?
soldering surface-mount
asked Nov 28 at 17:29
Leigh
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
6
Surface tension.
– The Photon
Nov 28 at 17:30
add a comment |
up vote
6
down vote
favorite
up vote
6
down vote
favorite
I am going to apologize ahead of time if this is a really simple question. I started learning to solder during my internship but I had no EE knowledge prior.
When I was working with surface mount soldering my internship adviser mentioned this property or effect, the name of which I'm blanking on, that would cause the pieces when heated to move into place on the pads of the board. Does anyone know what the name of that property or effect is?
soldering surface-mount
asked Nov 28 at 17:29
Leigh
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am going to apologize ahead of time if this is a really simple question. I started learning to solder during my internship but I had no EE knowledge prior.
When I was working with surface mount soldering my internship adviser mentioned this property or effect, the name of which I'm blanking on, that would cause the pieces when heated to move into place on the pads of the board. Does anyone know what the name of that property or effect is?
soldering surface-mount
soldering surface-mount
asked Nov 28 at 17:29
Leigh
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 28 at 17:29
Leigh
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 28 at 17:29
Leigh
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 28 at 17:29
Leigh
312
asked Nov 28 at 17:29
Leigh
312
312
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Leigh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
6
Surface tension.
– The Photon
Nov 28 at 17:30
add a comment |
6
Surface tension.
– The Photon
Nov 28 at 17:30
6
6
Surface tension.
– The Photon
Nov 28 at 17:30
Surface tension.
– The Photon
Nov 28 at 17:30
add a comment |
2 Answers
2
active
oldest
votes
up vote
14
down vote
It's just the surface tension of the solder in liquid state.
A physical system will settle in its lowest achievable energy configuration. Given the surface tension of the solder and the adhesion forces to the different surfaces it is in contact with, the lowest energy configuration would be all the component pins in the center of their respective pads. Of course, this assumes the presence of a solder mask and the resultant force overcoming any friction present.
It is the same principle that generates the meniscus of a liquid in a container.
answered Nov 28 at 17:37
Edgar Brown
2,533220
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
|
show 1 more comment
up vote
0
down vote
I think you are talking of surface tension.
Here is a video of a BGA that is not centred on the pads being reflowed.
https://www.youtube.com/watch?v=rmb3uLqueNU
answered Nov 28 at 17:37
user156047
51618
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
14
down vote
It's just the surface tension of the solder in liquid state.
A physical system will settle in its lowest achievable energy configuration. Given the surface tension of the solder and the adhesion forces to the different surfaces it is in contact with, the lowest energy configuration would be all the component pins in the center of their respective pads. Of course, this assumes the presence of a solder mask and the resultant force overcoming any friction present.
It is the same principle that generates the meniscus of a liquid in a container.
answered Nov 28 at 17:37
Edgar Brown
2,533220
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
|
show 1 more comment
up vote
14
down vote
It's just the surface tension of the solder in liquid state.
A physical system will settle in its lowest achievable energy configuration. Given the surface tension of the solder and the adhesion forces to the different surfaces it is in contact with, the lowest energy configuration would be all the component pins in the center of their respective pads. Of course, this assumes the presence of a solder mask and the resultant force overcoming any friction present.
It is the same principle that generates the meniscus of a liquid in a container.
answered Nov 28 at 17:37
Edgar Brown
2,533220
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
|
show 1 more comment
up vote
14
down vote
up vote
14
down vote
It's just the surface tension of the solder in liquid state.
A physical system will settle in its lowest achievable energy configuration. Given the surface tension of the solder and the adhesion forces to the different surfaces it is in contact with, the lowest energy configuration would be all the component pins in the center of their respective pads. Of course, this assumes the presence of a solder mask and the resultant force overcoming any friction present.
It is the same principle that generates the meniscus of a liquid in a container.
answered Nov 28 at 17:37
Edgar Brown
2,533220
It's just the surface tension of the solder in liquid state.
A physical system will settle in its lowest achievable energy configuration. Given the surface tension of the solder and the adhesion forces to the different surfaces it is in contact with, the lowest energy configuration would be all the component pins in the center of their respective pads. Of course, this assumes the presence of a solder mask and the resultant force overcoming any friction present.
It is the same principle that generates the meniscus of a liquid in a container.
answered Nov 28 at 17:37
Edgar Brown
2,533220
edited Nov 28 at 20:12
answered Nov 28 at 17:37
Edgar Brown
2,533220
answered Nov 28 at 17:37
Edgar Brown
2,533220
answered Nov 28 at 17:37
Edgar Brown
2,533220
2,533220
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
|
show 1 more comment
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 at 19:42
1
1
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 at 19:47
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
The contacts are not commonly copper, these are tin, or even gold. Copper develops a patina rather quickly which makes soldering to it more difficult. For normal commercial boards, solder mask is an isolator that covers everything, including copper traces, except where you want solder to go or to provide contact surfaces.
– Edgar Brown
Nov 28 at 19:55
1
1
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
It is probably worth to refer OP to the Wikipedia article on basic surface tension effects across a liquid-solid interface, en.wikipedia.org/wiki/Surface_tension
– Ale..chenski
Nov 28 at 20:09
|
show 1 more comment
up vote
0
down vote
I think you are talking of surface tension.
Here is a video of a BGA that is not centred on the pads being reflowed.
https://www.youtube.com/watch?v=rmb3uLqueNU
answered Nov 28 at 17:37
user156047
51618
add a comment |
up vote
0
down vote
I think you are talking of surface tension.
Here is a video of a BGA that is not centred on the pads being reflowed.
https://www.youtube.com/watch?v=rmb3uLqueNU
answered Nov 28 at 17:37
user156047
51618
add a comment |
up vote
0
down vote
up vote
0
down vote
I think you are talking of surface tension.
Here is a video of a BGA that is not centred on the pads being reflowed.
https://www.youtube.com/watch?v=rmb3uLqueNU
answered Nov 28 at 17:37
user156047
51618
I think you are talking of surface tension.
Here is a video of a BGA that is not centred on the pads being reflowed.
https://www.youtube.com/watch?v=rmb3uLqueNU
answered Nov 28 at 17:37
user156047
51618
answered Nov 28 at 17:37
user156047
51618
answered Nov 28 at 17:37
user156047
51618
answered Nov 28 at 17:37
user156047
51618
51618
add a comment |
add a comment |
Leigh is a new contributor. Be nice, and check out our Code of Conduct.
Leigh is a new contributor. Be nice, and check out our Code of Conduct.
Leigh is a new contributor. Be nice, and check out our Code of Conduct.
Leigh is a new contributor. Be nice, and check out our Code of Conduct.
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6
Surface tension.
– The Photon
Nov 28 at 17:30