Newsgroups: comp.robotics,sci.electronics
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!news.mathworks.com!udel!gatech!newsfeed.pitt.edu!dsinc!ub!acsu.buffalo.edu!ubvms.cc.buffalo.edu!v064mb9k
From: v064mb9k@ubvms.cc.buffalo.edu (NEIL B. GANDLER)
Subject: Re: Double Sided Boards
Message-ID: <D3sKEG.376@acsu.buffalo.edu>
News-Software: VAX/VMS VNEWS 1.50AXP 
Sender: nntp@acsu.buffalo.edu
Nntp-Posting-Host: ubvmsa.cc.buffalo.edu
Organization: University at Buffalo
References: <3h67lh$goa@usenet.INS.CWRU.Edu> <3ha410$squ@whitbeck.ncl.ac.uk> <3hahcl$4hb@lyra.csx.cam.ac.uk>
Date: Fri, 10 Feb 1995 16:02:00 GMT
Lines: 31
Xref: glinda.oz.cs.cmu.edu comp.robotics:17836 sci.electronics:119010

In article <3hahcl$4hb@lyra.csx.cam.ac.uk>, 93jkr@eng.cam.ac.uk (J.K. Rabone) writes...
>In article <3ha410$squ@whitbeck.ncl.ac.uk>,
>David Glennie  <David.Glennie@ncl.ac.uk> wrote:
>>
><snip>
>>
>>It's done by a technique known as 'plating through hole' (or PTH) in which
>>copper is laid on the sides of the hole to connect top and bottom layers.
>>This is an expensive process if you are making only one or two boards so I
>>would suggest that you make short tracks where you can solder pins through
>>the board away from your IC pins or mount your IC's in DIL sockets which
>>stand off the board a little so that you can get your soldering iron in to
>>solder the pins on the top side of the board. 
> 
> 
>You might find it easier not to use IC sockets at all, but just solder 
>the ICs direct on both sides. Don't use too big an iron though.
> 
>Jon.

	What also works well for jumpers and plated holes is standard staples.
They go right through, and stay perfectly in place to solder on both sides.
	The problem, I have found with double sided boards is lining up traces
on each sides properly.
		By the way, the pnp sheets work great for making a component
overlay marking for the top of the board. I am even considering using the
pnp material for a solder mask. Its quite durable and tough to scrub off.
Again the problem is lining it up properly. Any advice?


		Neil Gandler
