What is the effect that makes components on a circuit board move into place?
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 '18 at 17:29
Leigh
362
add a comment |
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 '18 at 17:29
Leigh
362
8
Surface tension.
– The Photon
Nov 28 '18 at 17:30
add a comment |
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 '18 at 17:29
Leigh
362
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 '18 at 17:29
Leigh
362
asked Nov 28 '18 at 17:29
Leigh
362
asked Nov 28 '18 at 17:29
Leigh
362
asked Nov 28 '18 at 17:29
Leigh
362
asked Nov 28 '18 at 17:29
Leigh
362
362
8
Surface tension.
– The Photon
Nov 28 '18 at 17:30
add a comment |
8
Surface tension.
– The Photon
Nov 28 '18 at 17:30
8
8
Surface tension.
– The Photon
Nov 28 '18 at 17:30
Surface tension.
– The Photon
Nov 28 '18 at 17:30
add a comment |
2 Answers
2
active
oldest
votes
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 '18 at 17:37
Edgar Brown
3,465425
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 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 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 at 20:09
|
show 1 more comment
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 '18 at 17:37
Elmesito
83619
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
});
});
}, "mathjax-editing");
StackExchange.ifUsing("editor", function () {
return StackExchange.using("schematics", function () {
StackExchange.schematics.init();
});
}, "cicuitlab");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "135"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f409384%2fwhat-is-the-effect-that-makes-components-on-a-circuit-board-move-into-place%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
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 '18 at 17:37
Edgar Brown
3,465425
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 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 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 at 20:09
|
show 1 more comment
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 '18 at 17:37
Edgar Brown
3,465425
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 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 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 at 20:09
|
show 1 more comment
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 '18 at 17:37
Edgar Brown
3,465425
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 '18 at 17:37
Edgar Brown
3,465425
edited Nov 28 '18 at 20:12
answered Nov 28 '18 at 17:37
Edgar Brown
3,465425
answered Nov 28 '18 at 17:37
Edgar Brown
3,465425
answered Nov 28 '18 at 17:37
Edgar Brown
3,465425
3,465425
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 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 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 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 '18 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 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 at 20:09
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 at 19:42
I didn't know about the solder mask. It promotes adhesion of liquid solder to copper?
– tjt263
Nov 28 '18 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 '18 at 19:44
No, it avoids adhesion of the solder to the places you don't want it to go.
– Edgar Brown
Nov 28 '18 at 19:44
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 at 19:47
So it's a substance applied to the board then, not the copper contacts?
– tjt263
Nov 28 '18 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 '18 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 '18 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 '18 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 '18 at 20:09
|
show 1 more comment
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 '18 at 17:37
Elmesito
83619
add a comment |
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 '18 at 17:37
Elmesito
83619
add a comment |
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 '18 at 17:37
Elmesito
83619
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 '18 at 17:37
Elmesito
83619
answered Nov 28 '18 at 17:37
Elmesito
83619
answered Nov 28 '18 at 17:37
Elmesito
83619
answered Nov 28 '18 at 17:37
Elmesito
83619
83619
add a comment |
add a comment |
Thanks for contributing an answer to Electrical Engineering Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f409384%2fwhat-is-the-effect-that-makes-components-on-a-circuit-board-move-into-place%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
8
Surface tension.
– The Photon
Nov 28 '18 at 17:30