Homebrew PCBs

In a message dated 12/8/2005 5:08:42 P.M. Central Standard Time,  
lcdpublishing@... writes:

I would  have to guess that this sort of laser would require a bit of power  
though.  <<
AND, what will a laser that can burn-away copper METAL do to  the epoxy below 
the copper???  
 
If there were a better way than etching, it would have surely  become a 
commercial reality by now!
 
I note some state an aversion to "acid".  Ferric chloride  may not belong in 
salad-dressing, but it is NOT an acid!  Ammonium  perchlorate, the "other 
etchant", isn't either!   Wonder if these  people have a fear of vinegar???   
Nevermind!  No  point!







[Non-text portions of this message have been removed]

I have a super fund cleanup site near me that used Ferric Chloride
to make circuit boards. Technically it is not an acid but it should be
handled like acid. Real vinegar is made from wine. The stuff sold in
stores is just another chemical. Read this about Ferric Cloride:

http://www.jtbaker.com/msds/englishhtml/f1060.htm



--- In Homebrew_PCBs@yahoogroups.com, JanRwl@A... wrote:
>
> In a message dated 12/8/2005 5:08:42 P.M. Central Standard Time,  
> lcdpublishing@y... writes:
> 
> I would  have to guess that this sort of laser would require a bit
of power  
> though.  <<
> AND, what will a laser that can burn-away copper METAL do to  the
epoxy below 
> the copper???  
>  
> If there were a better way than etching, it would have surely  become a 
> commercial reality by now!
>  
> I note some state an aversion to "acid".  Ferric chloride  may not
belong in 
> salad-dressing, but it is NOT an acid!  Ammonium  perchlorate, the
"other 
> etchant", isn't either!   Wonder if these  people have a fear of
vinegar???   

> Nevermind!  No  point!
> 
> 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>

<<
> AND, what will a laser that can burn-away copper METAL do to  the 
epoxy below 
> the copper???  

I have seen lasers that appeared to be able to focus their cutting 
depth. This would eliminate the concern about buring the substrate.  
However, I know nothing of laser cutting/ething machines.  IMTS is 
comming up in fall of 2006, that is always a great place to go to 
learn all about machine tools.  Hopefully I will have time to go 
there and nose around.

  
> If there were a better way than etching, it would have surely  
become a 
> commercial reality by now!

No doubt about it.  I am just looking at all the options and 
possibilites and making sure I am not "missing something" obvious.


> I note some state an aversion to "acid".  Ferric chloride  may not 
belong in 
> salad-dressing, but it is NOT an acid!  Ammonium  perchlorate, 
the "other 
> etchant", isn't either!   Wonder if these  people have a fear of 
vinegar???   
> Nevermind!  No  point!


Your right, no point.  However, fears are often not reasonable or 
logical.  I have a fear of heights - what the hell?  I have flown 
hundreds of thousands of miles in airplanes - yet I don't like being 
on a 10 foot ladder?

In a message dated 12/9/2005 6:41:47 A.M. Central Standard Time,  
lcdpublishing@... writes:

I have  flown hundreds of thousands of miles in airplanes - yet I don't like 
being on  a 10 foot ladder?<<
Ditto.  Statistically, even per-foot of altitude, you are  still safer in a 
commercial jet than on that ladder!  My wife cleans  out the gutters all around 
the house each time they need it!  Makes me  feel SO unworthy!  





[Non-text portions of this message have been removed]

Isn't it amazing how stupid it feels!  Even bridges give me the 
creeps!  


--- In Homebrew_PCBs@yahoogroups.com, JanRwl@A... wrote:
>
> In a message dated 12/9/2005 6:41:47 A.M. Central Standard Time,  
> lcdpublishing@y... writes:
> 
> I have  flown hundreds of thousands of miles in airplanes - yet I 
don't like 
> being on  a 10 foot ladder?<<
> Ditto.  Statistically, even per-foot of altitude, you are  still 
safer in a 
> commercial jet than on that ladder!  My wife cleans  out the 
gutters all around 

> the house each time they need it!  Makes me  feel SO unworthy!  
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>