Homebrew PCBs

I spoke with the owner of Injectorall a couple of years ago.  It is dip coated and gives very nice resolution.  That is why I am reluctant to give it up.  I'm in the USA and have not heard of the brands you mention.  

John
  ----- Original Message ----- 
  From: Philip Pemberton 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Monday, March 19, 2012 8:03 PM
  Subject: Re: [Homebrew_PCBs] Rejuvenating ferric chloride etchants


    
  On 19/03/12 22:10, John Anhalt wrote:
  > For my aerator, I use an aquarium pump and plastic tubes from the pet
  > store. I would not recommend the stone variety.

  Funny you should say that.... you just described the aeration setup in
  my etch tank :)

  I've got one of those foam bubbler hoses glued to the bottom of the tank
  with five-minute epoxy, then a hose running up one side to an aquarium
  air pump.

  I've also got the option of using a VisiTherm heater to warm the
  etchant, but I need to fix the holder -- the rubber pads have started to
  degrade and no longer stick to the plastic tank wall. In any case, it's
  only a 50W heater and takes ages to bring the tank up to a reasonable
  temperature.

  > I agree with you on the photoresist. Occasionally, a seller of small
  > quantities will appear on ebay. I haven't tried it yet, but have
  > wanted to ever since first reading about it several years ago. I am
  > afraid the manufacturer for my pre-sensitized boards (Injectorall,
  > available from DigiKey) is about to close shop.

  Thankfully I don't think Mega are going that way -- they seem to have
  been around for many years, and actually make two different precoated
  boards --
  - Fotoboard2 -- a roller-coated positive-acting board (Leon seems to
  like this one, I haven't tried it.. yet). Rapid sell this quite cheaply.
  - Microtrak -- dip-coated, positive acting. Apparently produced by
  Instagraphic Products, then later by Mega themselves. Allegedly better
  for fine-pitch work, bugger all price difference vs. Fotoboard (IIRC
  Fotoboard is about 5p cheaper). I've had problems with one or two edges
  of this stuff being uncoated, up to 1/3rd of an inch from the edge...

  Well, I've got 10x Fotoboard2 blanks on order.. who knows, maybe they'll
  work better than Microtrak?

  Thanks,
  -- 
  Phil.
  ygroups@...
  http://www.philpem.me.uk/


  

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