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Different PCB color (is it a different material?)
PCB drilling - drill bit material selectionPresensitised-PCB Build MethodPower supply positioning in PCB designHow to estimate the required PCB surface area for SMD power resistorsHow to create documentation layer at PBC at homeEthernet RMII on two layer PCBHow to design a feed line for a single wire antennapower & GND plane on two layer PCBsTrouble with PCB design for USB3 connectionsI2C Issues with First PCB
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$begingroup$
I have acquired this PCB.
The right side of the PCB handles high voltage AC power (250 V maximum,) while the left side handles low DC voltages (24 V maximum.)
They are separated, not only by board cuts, but also with this yellowish line in the middle. Is it just coloring to differentiate between the areas or is it some sort of protection material?
If it is some sort of protection material, how do I include it in my future designs?
pcb pcb-design pcb-fabrication
edited May 30 at 11:15
JRE
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
$endgroup$
add a comment |
$begingroup$
I have acquired this PCB.
The right side of the PCB handles high voltage AC power (250 V maximum,) while the left side handles low DC voltages (24 V maximum.)
They are separated, not only by board cuts, but also with this yellowish line in the middle. Is it just coloring to differentiate between the areas or is it some sort of protection material?
If it is some sort of protection material, how do I include it in my future designs?
pcb pcb-design pcb-fabrication
edited May 30 at 11:15
JRE
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
$endgroup$
add a comment |
$begingroup$
I have acquired this PCB.
The right side of the PCB handles high voltage AC power (250 V maximum,) while the left side handles low DC voltages (24 V maximum.)
They are separated, not only by board cuts, but also with this yellowish line in the middle. Is it just coloring to differentiate between the areas or is it some sort of protection material?
If it is some sort of protection material, how do I include it in my future designs?
pcb pcb-design pcb-fabrication
edited May 30 at 11:15
JRE
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
$endgroup$
I have acquired this PCB.
The right side of the PCB handles high voltage AC power (250 V maximum,) while the left side handles low DC voltages (24 V maximum.)
They are separated, not only by board cuts, but also with this yellowish line in the middle. Is it just coloring to differentiate between the areas or is it some sort of protection material?
If it is some sort of protection material, how do I include it in my future designs?
pcb pcb-design pcb-fabrication
pcb pcb-design pcb-fabrication
edited May 30 at 11:15
JRE
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
edited May 30 at 11:15
JRE
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
edited May 30 at 11:15
JRE
25.9k64886
edited May 30 at 11:15
JRE
25.9k64886
edited May 30 at 11:15
JRE
25.9k64886
25.9k64886
asked May 27 at 13:07
MalekMalek
23116
asked May 27 at 13:07
MalekMalek
23116
asked May 27 at 13:07
MalekMalek
23116
23116
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
$begingroup$
The green areas have been coated in solder-mask.
The yellowish area is simply the base color of the PCB material, which has not been coated.
It's the same base material throughout.
You would typically achieve this in your designs by adding features to the solder-mask layer(s) of your board.
The solder-mask layers are usually 'negative' images, so drawing something on those layers will result in the solder-mask being left out in those areas on your board.
answered May 27 at 13:15
brhansbrhans
9,91822431
$endgroup$
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
|
show 2 more comments
$begingroup$
The yellowish PCB laminate has better electrical insulation than some solder masks, so sometimes air gaps and solder mask free areas are used to separate the high voltage and low voltage side.
I work as CAM/CAM designer in a PCB fab, and recently we made a run of boards with no solder mask at all, because the boards were going in X-ray machines. Extremely high voltages, and the voltages would jump very easily through the solder mask.
edited May 30 at 22:33
Peter Mortensen
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
$endgroup$
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
add a comment |
$begingroup$
The yellowish line in the middle of the board is the true PCB colour.
The green areas either side are solder resist.
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
$endgroup$
add a comment |
$begingroup$
In this case the lack of solder mask won't afford any additional protection that adequate isolation doesn't already provide, so removing it for that purpose is futile. You may want to remove the solder mask for other reasons like adding plated text or artwork, peeling back the mask around pads, while creating custom footprints, and so on. While most programs have different naming conventions for these layers, they generally all have the same approach of applying solder mask anywhere there isn't a line, polygon or text on the layer. For example, in Eagle if you wanted to have a line with no mask separating two halves of the board you would draw a line on the tstop or bstop layers. In KiCAD you would do the same but on the f.mask or b.mask layers
answered May 28 at 10:58
MarticusMarticus
1
$endgroup$
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The green areas have been coated in solder-mask.
The yellowish area is simply the base color of the PCB material, which has not been coated.
It's the same base material throughout.
You would typically achieve this in your designs by adding features to the solder-mask layer(s) of your board.
The solder-mask layers are usually 'negative' images, so drawing something on those layers will result in the solder-mask being left out in those areas on your board.
answered May 27 at 13:15
brhansbrhans
9,91822431
$endgroup$
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
|
show 2 more comments
$begingroup$
The green areas have been coated in solder-mask.
The yellowish area is simply the base color of the PCB material, which has not been coated.
It's the same base material throughout.
You would typically achieve this in your designs by adding features to the solder-mask layer(s) of your board.
The solder-mask layers are usually 'negative' images, so drawing something on those layers will result in the solder-mask being left out in those areas on your board.
answered May 27 at 13:15
brhansbrhans
9,91822431
$endgroup$
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
|
show 2 more comments
$begingroup$
The green areas have been coated in solder-mask.
The yellowish area is simply the base color of the PCB material, which has not been coated.
It's the same base material throughout.
You would typically achieve this in your designs by adding features to the solder-mask layer(s) of your board.
The solder-mask layers are usually 'negative' images, so drawing something on those layers will result in the solder-mask being left out in those areas on your board.
answered May 27 at 13:15
brhansbrhans
9,91822431
$endgroup$
The green areas have been coated in solder-mask.
The yellowish area is simply the base color of the PCB material, which has not been coated.
It's the same base material throughout.
You would typically achieve this in your designs by adding features to the solder-mask layer(s) of your board.
The solder-mask layers are usually 'negative' images, so drawing something on those layers will result in the solder-mask being left out in those areas on your board.
answered May 27 at 13:15
brhansbrhans
9,91822431
answered May 27 at 13:15
brhansbrhans
9,91822431
answered May 27 at 13:15
brhansbrhans
9,91822431
answered May 27 at 13:15
brhansbrhans
9,91822431
9,91822431
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
|
show 2 more comments
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
1
1
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
$begingroup$
Out of curiosity, can one tell what material the PCB is made of from this? The color looks slightly different than what I expect for FR-4.
$endgroup$
– Hearth
May 27 at 15:27
6
6
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
$begingroup$
@Hearth - "FR-4" doesn't really tell you very much about what the PCB substrate is actually made from. It's supposed to conform to this list of specs, and is probably a glass-reinforced epoxy laminate of some kind. The example in the OP's pics looks reasonable normal, maybe slightly on the pale side of average - but that could be the lighting.
$endgroup$
– brhans
May 27 at 16:59
2
2
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
$begingroup$
@brhans Hmm, and here I was working as an electrical engineer for years thinking FR-4 was one specific material! I guess it doesn't matter exactly what it is if it has all the relevant properties, though.
$endgroup$
– Hearth
May 27 at 17:02
10
10
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
$begingroup$
More important is the fact that the "yellowish area" has had the copper etched off. This is what creates the electrical separation to isolate the HV and LV sides. It is not only missing the soldermask, but the copper.
$endgroup$
– khargoosh
May 27 at 23:05
5
5
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
$begingroup$
@khargoosh It's not only the yellowish area that has had the copper etched off - the dark green area has too. The yellowish area has the solder resist not placed there to clearly mark the separate zones (but that is a purely visual marking).
$endgroup$
– Martin Bonner
May 28 at 10:02
|
show 2 more comments
$begingroup$
The yellowish PCB laminate has better electrical insulation than some solder masks, so sometimes air gaps and solder mask free areas are used to separate the high voltage and low voltage side.
I work as CAM/CAM designer in a PCB fab, and recently we made a run of boards with no solder mask at all, because the boards were going in X-ray machines. Extremely high voltages, and the voltages would jump very easily through the solder mask.
edited May 30 at 22:33
Peter Mortensen
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
$endgroup$
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
add a comment |
$begingroup$
The yellowish PCB laminate has better electrical insulation than some solder masks, so sometimes air gaps and solder mask free areas are used to separate the high voltage and low voltage side.
I work as CAM/CAM designer in a PCB fab, and recently we made a run of boards with no solder mask at all, because the boards were going in X-ray machines. Extremely high voltages, and the voltages would jump very easily through the solder mask.
edited May 30 at 22:33
Peter Mortensen
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
$endgroup$
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
add a comment |
$begingroup$
The yellowish PCB laminate has better electrical insulation than some solder masks, so sometimes air gaps and solder mask free areas are used to separate the high voltage and low voltage side.
I work as CAM/CAM designer in a PCB fab, and recently we made a run of boards with no solder mask at all, because the boards were going in X-ray machines. Extremely high voltages, and the voltages would jump very easily through the solder mask.
edited May 30 at 22:33
Peter Mortensen
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
$endgroup$
The yellowish PCB laminate has better electrical insulation than some solder masks, so sometimes air gaps and solder mask free areas are used to separate the high voltage and low voltage side.
I work as CAM/CAM designer in a PCB fab, and recently we made a run of boards with no solder mask at all, because the boards were going in X-ray machines. Extremely high voltages, and the voltages would jump very easily through the solder mask.
edited May 30 at 22:33
Peter Mortensen
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
edited May 30 at 22:33
Peter Mortensen
1,58931422
edited May 30 at 22:33
Peter Mortensen
1,58931422
edited May 30 at 22:33
Peter Mortensen
1,58931422
1,58931422
answered May 28 at 16:21
JakesanJakesan
32113
answered May 28 at 16:21
JakesanJakesan
32113
answered May 28 at 16:21
JakesanJakesan
32113
32113
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
add a comment |
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
6
6
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
When I saw this question I was wondering why the solder mask was removed, this clears it up.
$endgroup$
– Redja
May 28 at 22:16
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
$begingroup$
Wouldn't proper conformal coating solve this issue ?
$endgroup$
– Malek
May 31 at 7:19
add a comment |
$begingroup$
The yellowish line in the middle of the board is the true PCB colour.
The green areas either side are solder resist.
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
$endgroup$
add a comment |
$begingroup$
The yellowish line in the middle of the board is the true PCB colour.
The green areas either side are solder resist.
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
$endgroup$
add a comment |
$begingroup$
The yellowish line in the middle of the board is the true PCB colour.
The green areas either side are solder resist.
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
$endgroup$
The yellowish line in the middle of the board is the true PCB colour.
The green areas either side are solder resist.
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
answered May 27 at 13:16
Neil_UKNeil_UK
81.3k285188
81.3k285188
add a comment |
add a comment |
$begingroup$
In this case the lack of solder mask won't afford any additional protection that adequate isolation doesn't already provide, so removing it for that purpose is futile. You may want to remove the solder mask for other reasons like adding plated text or artwork, peeling back the mask around pads, while creating custom footprints, and so on. While most programs have different naming conventions for these layers, they generally all have the same approach of applying solder mask anywhere there isn't a line, polygon or text on the layer. For example, in Eagle if you wanted to have a line with no mask separating two halves of the board you would draw a line on the tstop or bstop layers. In KiCAD you would do the same but on the f.mask or b.mask layers
answered May 28 at 10:58
MarticusMarticus
1
$endgroup$
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
add a comment |
$begingroup$
In this case the lack of solder mask won't afford any additional protection that adequate isolation doesn't already provide, so removing it for that purpose is futile. You may want to remove the solder mask for other reasons like adding plated text or artwork, peeling back the mask around pads, while creating custom footprints, and so on. While most programs have different naming conventions for these layers, they generally all have the same approach of applying solder mask anywhere there isn't a line, polygon or text on the layer. For example, in Eagle if you wanted to have a line with no mask separating two halves of the board you would draw a line on the tstop or bstop layers. In KiCAD you would do the same but on the f.mask or b.mask layers
answered May 28 at 10:58
MarticusMarticus
1
$endgroup$
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
add a comment |
$begingroup$
In this case the lack of solder mask won't afford any additional protection that adequate isolation doesn't already provide, so removing it for that purpose is futile. You may want to remove the solder mask for other reasons like adding plated text or artwork, peeling back the mask around pads, while creating custom footprints, and so on. While most programs have different naming conventions for these layers, they generally all have the same approach of applying solder mask anywhere there isn't a line, polygon or text on the layer. For example, in Eagle if you wanted to have a line with no mask separating two halves of the board you would draw a line on the tstop or bstop layers. In KiCAD you would do the same but on the f.mask or b.mask layers
answered May 28 at 10:58
MarticusMarticus
1
$endgroup$
In this case the lack of solder mask won't afford any additional protection that adequate isolation doesn't already provide, so removing it for that purpose is futile. You may want to remove the solder mask for other reasons like adding plated text or artwork, peeling back the mask around pads, while creating custom footprints, and so on. While most programs have different naming conventions for these layers, they generally all have the same approach of applying solder mask anywhere there isn't a line, polygon or text on the layer. For example, in Eagle if you wanted to have a line with no mask separating two halves of the board you would draw a line on the tstop or bstop layers. In KiCAD you would do the same but on the f.mask or b.mask layers
answered May 28 at 10:58
MarticusMarticus
1
answered May 28 at 10:58
MarticusMarticus
1
answered May 28 at 10:58
MarticusMarticus
1
answered May 28 at 10:58
MarticusMarticus
1
1
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
add a comment |
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
3
3
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
$begingroup$
There might be differences in how the solder mask vs the bare pcb material behave regarding moisture absorption, dust adhesion, carbon tracking ...
$endgroup$
– rackandboneman
May 28 at 23:02
add a comment |
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