What equipment do you use to apply the etch-resist pattern to the boards, etch them, and then bond them together?
Is it all very expensive for a hobbyist to produce one-off boards for experiments & prototypes? (Probably nothing as complicated as a Q40 board.) In comparison to, say, the cost of digital photography with film scanner, A3 printer, software, consumables? (Probably another stupid question from an ignoramus) Ian. > -----Original Message----- > From: tony > Sent: 11 January 2002 12:23 > To: ql-users > Cc: tony > Subject: Re: [ql-users] Q40/Q60/??? Ultra IO card > > > > > >> -----Original Message----- > >> From: Norman.Dunbar > >> Sent: 11 January 2002 11:29 > >> To: ql-users > >> Cc: Norman.Dunbar > >> Subject: RE: [ql-users] Q40/Q60/??? Ultra IO card > >> > >> > >> Silly question from a hardware ignoramus : > >> > >> what is a 6 layer (or 4 layer) board ? > >> I suspect it is to do with the track layour, but all the > >> boards I ever used > >> were 'double sided' = 2 layer ??? > > Yes. > Nasta will give the definitive reply of course - on one screen please. > Last time I said this to Nasta, he said he was working on an 1800 x > something screen - (8-)# > > I did my first 4 layer with Mplane, mainly for an inner 'ground plane' > and a power layer - ie only etch away around vias (layer connections) > and holes. Often the ground plane is there simply to reduce > noise, but > it makes it easy to provide the necessary higher current capacity and > avoid voltage drops etc. > > However I found I needed to use the +5V layer for some signal lines as > there was simply no room on outer layers. > > If a lot of signal layers are internal it nicely hides the pcb design > from hackers (8-)# It makes design debugging (at pcb design > stage) far > more difficult. Until we get _real_ 3D monitors, separation is by > colour only - not easy. > A hologram screen would be very nice. > > -- > QBBS (QL fido BBS 2:257/67) +44(0)1442-828255 > mailto:[EMAIL PROTECTED] http://www.firshman.demon.co.uk > Voice: +44(0)1442-828254 Fax: +44(0)1442-828255 > TF Services, 29 Longfield Road, TRING, Herts, HP23 4DG > Visit our website at http://www.ubswarburg.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments.
