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2012-10-15 by circuit2u@rocketmail.com
hi everyone, i have worked in bare board pcb for 30 yrs now & run a small but expanding eBay store supplying tools & materials for pcb making. the link to the store is: www.stores.ebay.co.uk/pcb-circuit-electromart with many suppliers i have access to a very wide range of sought after product. if i can help you out i will cheers everybody, Neil
2012-10-15 by MIKE DURKIN
Im a noob too ... I will be looking for FR4??or lighter copper clad board for SMD stuff ... I don't know how thin copper can be put on fiberglass, but I will be looking for something that would be fairly easy to etch to hold stuff like pic32mx 100pin ic's ... Mike KC7NOA To: Homebrew_PCBs@yahoogroups.com
From: circuit2u@...
Date: Mon, 15 Oct 2012 20:42:39 +0000
Subject: [Homebrew_PCBs] newbie says hi!
hi everyone, i have worked in bare board pcb for 30 yrs now & run a small but expanding eBay store supplying tools & materials for pcb making. the link to the store is:
www.stores.ebay.co.uk/pcb-circuit-electromart
with many suppliers i have access to a very wide range of sought after product.
if i can help you out i will
cheers everybody, Neil
[Non-text portions of this message have been removed]2012-10-15 by Harvey White
On Mon, 15 Oct 2012 15:30:22 -0700, you wrote: >Im a noob too ... > >I will be looking for FR4??or lighter copper clad board for SMD stuff ... FR4 is the type of material, not a thickness. It's a bit more flame resistant than FR3, for instance. Paper based boards are common in commercial equipment, while fiberglass (and more exotic materials) are common in higher end commercial and military. Thickness of foil is measured in oz/sq foot. 1 oz is a common standard, with 2 oz being considered heavy duty (high current) and 1/2 oz becoming somewhat of a new standard. When copper is etched, it will undercut as the etching process progresses, since the etchant can eat underneath the resist. What is ideally a rectangle becomes a trapezoid. When it becomes a pyramid, there's nothing holding the copper to the board (or no copper to be held), and the trace floats away. so 1/2 oz or 1 oz is fine, typically 0.063 is thought of as a standard thickness, while 0.033 will work for some applications, depending on mechanical stress, size of parts, number of wires, and the like (also kind of connector used to wire to the board). 1 oz will do a tqfp-100 pin IC with 0.5 mm spacing, which is attainable with various methods. You may wish to try something a little less "picky" for a first attempt, though, as you get the process tuned to your setup. Harvey
> >I don't know how thin copper can be put on fiberglass, but I will be looking for something that would be fairly easy to etch to hold stuff like pic32mx 100pin ic's ... > >Mike KC7NOA
2012-10-15 by Neil Allen
i have fr4 1.6mm 100x160 35micron copper to both sides also packs of small pieces ( 10) single OR double sided FR2 single sided in a variety of panel sizes cheers Neil ________________________________
From: MIKE DURKIN <Patriot121@...>
To: homebrew_pcbs@yahoogroups.com
Sent: Monday, October 15, 2012 11:30 PM
Subject: RE: [Homebrew_PCBs] newbie says hi!
Im a noob too ...
I will be looking for FR4??or lighter copper clad board for SMD stuff ...
I don't know how thin copper can be put on fiberglass, but I will be looking for something that would be fairly easy to etch to hold stuff like pic32mx 100pin ic's ...
Mike KC7NOA
To: Homebrew_PCBs@yahoogroups.com
From: circuit2u@...
Date: Mon, 15 Oct 2012 20:42:39 +0000
Subject: [Homebrew_PCBs] newbie says hi!
hi everyone, i have worked in bare board pcb for 30 yrs now & run a small but expanding eBay store supplying tools & materials for pcb making. the link to the store is:
www.stores.ebay.co.uk/pcb-circuit-electromart
with many suppliers i have access to a very wide range of sought after product.
if i can help you out i will
cheers everybody, Neil
[Non-text portions of this message have been removed]
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