| Author |
Message |
vmanojnair
Joined: 20 Nov 2006
Posts: 2
|
 20 Nov 2006 5:14 Why PCB color is Black |
|
|
|
Hello Friends,
I am Manoj V , working as a internet security engineer. I have a doubt regarding Printed Circuit Board.
Why All the PCB's are in Green color ?
Hope i get right answer.
Thanks
Manoj V
|
|
| Back to top |
|
 |
dindeds
Joined: 11 Aug 2006
Posts: 125
Helped: 8
|
| 20 Nov 2006 5:21 Why PCB color is Black |
|
|
|
Those Green color are called soldermask.They are available in many colors including Green & black.
The purpose is to protect the Cu layer from corrosion and provide good insulation.
|
|
| Back to top |
|
|
vmanojnair
Joined: 20 Nov 2006
Posts: 2
|
| 20 Nov 2006 5:25 Re: Why PCB color is Black |
|
|
|
Dindeds,
Thanks for your fast reply 
|
|
| Back to top |
|
|
evl_inside
Joined: 10 Aug 2006
Posts: 51
Helped: 3
Location: Mars
|
| 22 Nov 2006 16:02 Re: Why PCB color is Black |
|
|
|
| you can also have PCB's in Black or white color. the color of the board depends on the solder mask
|
|
| Back to top |
|
|
billlee000
Joined: 13 Aug 2005
Posts: 10
|
| 14 Dec 2006 6:07 Re: Why PCB color is Black |
|
|
|
The solder mask could be yellow or red too. It depends on customer requirement.
Regards
|
|
| Back to top |
|
|
jsps
Joined: 20 Apr 2006
Posts: 61
|
| 30 Jan 2007 14:16 Re: Why PCB color is Black |
|
|
|
| color never affect the performance of the PCB, it may be tradition!
|
|
| Back to top |
|
|
kender
Joined: 19 Jun 2005
Posts: 957
Helped: 70
Location: Stanford, SF Bay Peninsula, California, Earth, Solar System, Milky Way
|
| 06 Mar 2007 7:28 Re: Why PCB color is Black |
|
|
|
| dindeds wrote: |
Those Green color are called soldermask.They are available in many colors including Green & black.
The purpose is to protect the Cu layer from corrosion and provide good insulation. |
Most importantly - solder mask (as the name suggests) prevents the solder from bridging adjacent traces and pins. Not all circuit boards have solder mask, though. Many cheap boards in the power supplied don't have it.
|
|
| Back to top |
|
|
rogerynt
Joined: 06 Mar 2007
Posts: 109
Helped: 11
|
| 11 Mar 2007 13:21 Re: Why PCB color is Black |
|
|
|
Yes, solder mask is to avoid solder paste in between pads short together when pass through wave or reflow machine. Otherwise, the pcbA may damage due to short circuit when test by jigs.
On top of the solder mask, there is normally an addition white paint called silkscreen to print on it. ( Normally, critical areas e.g ic pads region, areas may easy to find short circuit ) The purpose is to give addition protection as well as shows reference designator number, pcb information etc.
According to latest European regulation they all MUST fullfil RoHS requirement.
|
|
| Back to top |
|
|
Meridian
Joined: 19 Apr 2007
Posts: 319
Helped: 17
Location: Ontario, Canada
|
| 16 May 2007 14:29 Re: Why PCB color is Black |
|
|
|
| vmanojnair wrote: |
Hello Friends,
I am Manoj V , working as a internet security engineer. I have a doubt regarding Printed Circuit Board.
Why All the PCB's are in Green color ?
Hope i get right answer.
Thanks
Manoj V |
If you're referring to the physical green color of the board, it indicates it is made of glass-epoxy which is naturally greenish in color. Bakelite pcb is brown and is difficult to work with in regards to cutting, or sawing it to size. Glass-epoxy boards on the other hand are easy to work with and don't break or splinter.
If you're referring to the track-coating or film, it can be either black, green, or red.
It is just the color of the photosensitive film and can be basically any color. But is usually left green, black or red.
|
|
| Back to top |
|
|
medsalehi
Joined: 29 May 2007
Posts: 3
Helped: 1
|
| 29 May 2007 9:02 Re: Why PCB color is Black |
|
|
|
Hi,
You can have PCB's in many colors.
Thanks for all these information.
|
|
| Back to top |
|
|
fazan83
Joined: 11 May 2006
Posts: 124
Helped: 1
Location: Gurun, Kedah, Malaysia
|
| 29 May 2007 9:14 Re: Why PCB color is Black |
|
|
|
| medsalehi wrote: |
Hi,
You can have PCB's in many colors.
Thanks for all these information. |
But for display PCB usually better to be in black for the contrast.
|
|
| Back to top |
|
|
spikeyang
Joined: 03 Mar 2005
Posts: 91
Helped: 4
Location: Shanghai China
|
| 13 Jul 2007 10:30 Why PCB color is Black |
|
|
|
| I got blue PCB, it's beautiful.
|
|
| Back to top |
|
|
blueroomelectronics
Joined: 17 Sep 2006
Posts: 1229
Helped: 60
Location: Toronto, Canada
|
| 19 Jul 2007 7:02 Why PCB color is Black |
|
|
|
| I like blue too, all my kits use blue PCBs
|
|
| Back to top |
|
|
castrader
Joined: 08 Jun 2005
Posts: 38
Helped: 6
|
| 01 Aug 2007 14:54 Why PCB color is Black |
|
|
|
my pcb is brown
hehe
|
|
| Back to top |
|
|
the_risk_master
Joined: 12 Aug 2005
Posts: 671
Helped: 59
Location: UE+MIT, Philippines, (14°N , 120°E )
|
| 01 Aug 2007 17:23 Re: Why PCB color is Black |
|
|
|
| Mine is good too, silver-coated
|
|
| Back to top |
|
|
