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CC Advertisers
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08-16-2009, 06:32 PM
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CC Member
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Join Date: Jan 2002
Location: Bridgewater,
NJ
Cobra Make, Engine: B & B
Posts: 1,323
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Not Ranked
Acid Etching....did you every wonder why?
Did you every wonder why the acid etching liquid does not remove the metal under the protective masking? You would think it would remove the metal under the protective masking as well.
Interesting 
__________________
Just enough knowledge to build a cobra and be dangerous...
You can observe a lot from just watching.
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08-16-2009, 07:37 PM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
On a PCB it does tunnel a little.
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08-16-2009, 10:41 PM
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CC Member
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Join Date: Feb 2000
Location: St. Lucia, West Indies,
WI
Cobra Make, Engine: Unique 427SC 383 stroker
Posts: 3,786
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Not Ranked
It sure does on PCB copper and I would imagine it does on other metals as well. The masked and therefore untouched surface edge appears sharp but the acid almost certainly acts laterally beneath it as well as vertically. Here is a cross sectional representation of a PCB etch.
__________________
Tropical Buzz
Grant me the serenity to accept the things I cannot change, the strength to change the things I can, and the wisdom to know the difference. -(wasn't me)
BEWARE OF THE DOGma!! Dogmatism bites...
Last edited by Buzz; 08-16-2009 at 10:49 PM..
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08-17-2009, 05:41 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Dang, I think I have that same picture.
Nice Buzz.
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08-17-2009, 06:00 AM
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CC Member
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Join Date: Jan 2002
Location: Bridgewater,
NJ
Cobra Make, Engine: B & B
Posts: 1,323
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Not Ranked
Thaks for the info guys. Excellent graphic.
__________________
Just enough knowledge to build a cobra and be dangerous...
You can observe a lot from just watching.
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08-17-2009, 09:00 AM
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CC Member
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Join Date: Jul 2003
Location: Huntsville, AL,
AL
Cobra Make, Engine: 90% of a 428 friggin SCJ Engine!
Posts: 4,474
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Not Ranked
Is there no bit of esoterica that Cobra folks do not know? 
__________________
Happy to be back at Club Cobra!
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08-17-2009, 12:27 PM
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CC Member
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Join Date: Jan 2002
Location: Bridgewater,
NJ
Cobra Make, Engine: B & B
Posts: 1,323
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Not Ranked
If I was on Who wants to be a millionaire I would use CC as a lifeline!
__________________
Just enough knowledge to build a cobra and be dangerous...
You can observe a lot from just watching.
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08-18-2009, 06:39 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
We would hope that all member(s) would be "online" as you climb the ladder.
Let's see, 1,000,000 divided by 15,000 is...
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08-18-2009, 06:55 AM
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CC Member
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Join Date: Jan 2002
Location: Bridgewater,
NJ
Cobra Make, Engine: B & B
Posts: 1,323
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Not Ranked
Can we at least divide after taxes are taken out?
__________________
Just enough knowledge to build a cobra and be dangerous...
You can observe a lot from just watching.
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08-18-2009, 07:29 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Hahahahahaha Now that is funny.
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