Homebrew PCBs

Hi
Just had a thought about a board i have to do soon
it needs to have a ground plane on the top side.

Now i have got some d\side photo resist board, and
i was thinking that if i do not expose the side that
is going to be the ground plane to UV, and just develop
it, would that keep it covered so that after etching i 
have got a ground plane ??

Thanks in advance for any input

Howard

If it's solid copper, then yes.  If it has thu-hole components, then no.

It also depends on whether your using positive or negative resist.

----- Original Message ----
From: Howard <hj.payne@...>
To: Homebrew_PCBs@yahoogroups.com
Sent: Thursday, July 17, 2008 10:09:46 AM
Subject: [Homebrew_PCBs] HELP: D\Side Photo resist pcb


Hi
Just had a thought about a board i have to do soon
it needs to have a ground plane on the top side.

Now i have got some d\side photo resist board, and
i was thinking that if i do not expose the side that
is going to be the ground plane to UV, and just develop
it, would that keep it covered so that after etching i 
have got a ground plane ??

Thanks in advance for any input

Howard

 


      

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

--- In Homebrew_PCBs@yahoogroups.com, KeepIt SimpleStupid
<keepitsimplestupid@...> wrote:
>
> If it's solid copper, then yes.  If it has thu-hole components, then no.
> 
> It also depends on whether your using positive or negative resist.
> 
> 
> ----- Original Message ----
> From: Howard <hj.payne@...>
> To: Homebrew_PCBs@yahoogroups.com
> Sent: Thursday, July 17, 2008 10:09:46 AM
> Subject: [Homebrew_PCBs] HELP: D\Side Photo resist pcb
> 
> 
> Hi
> Just had a thought about a board i have to do soon
> it needs to have a ground plane on the top side.
> 
> Now i have got some d\side photo resist board, and
> i was thinking that if i do not expose the side that
> is going to be the ground plane to UV, and just develop
> it, would that keep it covered so that after etching i 
> have got a ground plane ??
> 
> Thanks in advance for any input
> 
> Howard
> 
>  
> 
> 
>       
> 
> [Non-text portions of this message have been removed]
>
Hi
yes it is solid copper and positive resist pcb
it has thu-hole components, but i can clear these with a 
drill bit, the rest of the components ground are to the
top side of the board.

Howard

There is a small PC, router like bit you can buy which will remove the copper foil.
Vector Electronics, maybe.  It's used for prototyping.

Hi
yes it is solid copper and positive resist pcb
it has thu-hole components, but i can clear these with a 
drill bit, the rest of the components ground are to the
top side of the board.

Howard

 


      

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

----- Original Message ----- 

From: "Howard" <hj.payne@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, July 17, 2008 3:09 PM
Subject: [Homebrew_PCBs] HELP: D\Side Photo resist pcb


> Hi
> Just had a thought about a board i have to do soon
> it needs to have a ground plane on the top side.
> 
> Now i have got some d\side photo resist board, and
> i was thinking that if i do not expose the side that
> is going to be the ground plane to UV, and just develop
> it, would that keep it covered so that after etching i 
> have got a ground plane ??

That's how I make RF boards that need a ground plane on one side.

Leon

----- Original Message ----- 

From: "KeepIt SimpleStupid" <keepitsimplestupid@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, July 17, 2008 3:19 PM
Subject: Re: [Homebrew_PCBs] HELP: D\Side Photo resist pcb


> If it's solid copper, then yes.  If it has thu-hole components, then no.

Through-hole parts are OK, you just have to relieve the copper on the ground 
plane where the connections aren't grounded with a drill.

Leon

--- In Homebrew_PCBs@yahoogroups.com, "Leon" <leon355@...> wrote:
>
> ----- Original Message ----- 
> From: "Howard" <hj.payne@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Thursday, July 17, 2008 3:09 PM
> Subject: [Homebrew_PCBs] HELP: D\Side Photo resist pcb
> 
> 
> > Hi
> > Just had a thought about a board i have to do soon
> > it needs to have a ground plane on the top side.
> > 
> > Now i have got some d\side photo resist board, and
> > i was thinking that if i do not expose the side that
> > is going to be the ground plane to UV, and just develop
> > it, would that keep it covered so that after etching i 
> > have got a ground plane ??
> 
> That's how I make RF boards that need a ground plane on one side.
> 
> Leon
>
Hi
Spot on Leon !!
its a transverter for 4m that i am making
hows it going with the timer project ?, could do with one soon
mad a mess with a few boards (over exp) lol

Howard

On Thu, 17 Jul 2008 14:09:46 -0000, you wrote:

>Hi
>Just had a thought about a board i have to do soon
>it needs to have a ground plane on the top side.
>
>Now i have got some d\side photo resist board, and
>i was thinking that if i do not expose the side that
>is going to be the ground plane to UV, and just develop
>it, would that keep it covered so that after etching i 
>have got a ground plane ??

One trick I used with a ground plane was to print just the pads on the
ground plane side, but reverse the artwork black for white.  That
gives you holes where the pads are, ground everywhere else.
Registration should not be a problem.

Harvey

>
>Thanks in advance for any input
>
>Howard
>