PCB error - Electronic Circuits Projects Diagrams Free

Electronics4you · 19th October 2006, 10:00 PM

Hi There,

After etching a PCB I discovered a big spot across some of the traces - proberly from a finger. I transfered the PCB layout from a transperant film. What would be the best way to remove "finger" and others from both the PCB and the film before etching without destroyng them?

**Nigel Goodwin** · 20th October 2006, 09:26 AM

Don't handle either the film, or the PCB, just touch the edges - cleanliness is vital!.

justDIY · 20th October 2006, 11:50 AM

or wear latex/nitrile gloves ... that way the missplaced thumb won't cause any grief.

as far as your pcb, that area is ruined, you could possible etch and then use a fine blade / very fine dremel bit to remove the offending bits of copper bridging the traces

the film is ruined, anything to clean the thumbprint off will also damange the plastic film or remove the toner/ink.

Nanbe1st · 20th October 2006, 12:38 PM

hello ladies and gents!
I've been kind of lurking around.
I love this site! thanks for having me

Hero999 · 20th October 2006, 09:29 PM

I wouldn't recommend using film because it's far too sensitive to finger prints. Try using tracing paper, it diffuses the light very slightly so fine inperfections like specks of dust and finger prints while keeping the important stuff like your artwork.

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19th October 2006, 10:00 PM	#1
Electronics4you	PCB error Hi There, After etching a PCB I discovered a big spot across some of the traces - proberly from a finger. I transfered the PCB layout from a transperant film. What would be the best way to remove "finger" and others from both the PCB and the film before etching without destroyng them? Attached Thumbnails

20th October 2006, 09:26 AM	#2
Nigel Goodwin	Don't handle either the film, or the PCB, just touch the edges - cleanliness is vital!. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

20th October 2006, 11:50 AM	#3
justDIY	or wear latex/nitrile gloves ... that way the missplaced thumb won't cause any grief. as far as your pcb, that area is ruined, you could possible etch and then use a fine blade / very fine dremel bit to remove the offending bits of copper bridging the traces the film is ruined, anything to clean the thumbprint off will also damange the plastic film or remove the toner/ink. __________________ If you don't have a planet, what good are gold bars? want to contact me directly? gmail gordonthree check out my project website: http://projects.dimension-x.net Favorite numbers: 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

20th October 2006, 12:38 PM	#4
Nanbe1st	Hello, sort anoob here hello ladies and gents! I've been kind of lurking around. I love this site! thanks for having me

20th October 2006, 09:29 PM	#5
Hero999	I wouldn't recommend using film because it's far too sensitive to finger prints. Try using tracing paper, it diffuses the light very slightly so fine inperfections like specks of dust and finger prints while keeping the important stuff like your artwork. __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.