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January 2008

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Subject:
From:
R Sedlak <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, R Sedlak <[log in to unmask]>
Date:
Thu, 24 Jan 2008 15:44:35 -0800
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If it worked on an Anglia, it would probably de-coke hell...

Rudy Sedlak

John Burke <[log in to unmask]> wrote: Well it used to work to de-coke my old Ford anglia cylinder heads - sodium
hydroxide solution as I recall.....

John

 
 
John Burke
 
(408) 515 4992
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of R Sedlak
Sent: Thursday, January 24, 2008 2:26 PM
To: [log in to unmask]
Subject: Re: [TN] laser carbon residue

Jim:  Is cutting done before or after soldermask application?  It there Tin
metal on board?

If the cutting is done before soldermask, and if there is no exposed Tin, I
would suggest something strongly alkaline.

Rudy Sedlak
RD Chemical Company

Jim Henderson  wrote: All,

 

We do quite a bit of laser cutting here that leaves a light carbon residue
on the edges of the board and holes.  Right now we are cleaning it off with
a cloth and alcohol at final inspection.  Is this common practice or does
anyone know a better way?  Our laser is UV powered if that helps any.

 

Thanks in advance for any help.

 

Jim Henderson

Colonial Circuits, Inc.

800-578-9602 ext 118

 

 


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