Homebrew PCBs

On 09 Nov 2016 00:06:48 -0800, you wrote:

>Does anyone know of a you-tube video that clearly does the entire process
> or a site that clearly describes the process for pdf downloads? What I mean is alignment of top negative and bottom negative. I tried my first attempt yesterday with a two board project and this is the result. Bottom main brd,
> good to etch with a couple of test holes drilled and good alignment with a pouch made up and brd slipped into three side closed pouch. Top LCD
> display brd was off and one side of that brd has to be redone or start over with a wasted 4in by 4in brd scrap. I need a better system due to small traces and pads.Any help would be appreciated for a newbi. 

Go back and check some of the posts, please, there are several
methods.  What I do is to drill VERY accurate alignment holes.  I make
separate top and bottom boards, it does require thinner 0.020 to 0.032
single sided material.

The next step is to epoxy the boards together.  The best epoxy is a
1/2 hour setting or more, it allows you to do a run of boards without
wasting epoxy.  

I use push pins (relatively thick) that do not wobble, and then use it
to align the boards, one of which has been precoated with epoxy.  tape
the boards together to keep them from moving, then remove the pins.
Put the boards between ceramic tiles (cheap) which keeps the boards
from warping.  It can also help to cover the board copper with masking
tape to eliminate fingerprints.

Harvey