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Yes, thanks everyone. I learned quite a bit. I did not about this.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Syed Ahmad
Sent: Tuesday, April 07, 2009 12:24 PM
To: [log in to unmask]
Subject: Re: [TN] Roll-to-Roll Research
Joe,
Thank you for your response. We will continue reviewing and using info you
provided as we pursue this research. Thank you for all the useful info. Our
students have been consulting your book.
Syed.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
Sent: Tuesday, April 07, 2009 9:37 AM
To: [log in to unmask]
Subject: Re: [TN] Roll-to-Roll Research
Good Morning Syed,
Are you interest in the process or the processing equipment? It is not
certain from your question.
There are few supplier of equipment and some folks out there now printing
circuits in such a fashion but the roots are pretty deep. I was involved in
such
a project in 1990 when we printed catalytic toners on to web using laser
printers at a start-up I helped found called ELF (Extended Length Flex)
Technologies but it was too early for the market.
At APEX last week Conductive Injet Technology showed parts from a system
they have developed that works along a similar line but can produce much
finer
features. Flex circuit veteran Joel Yocum is involved and you can see a
video
of him and his colleague Steve Thomas talking about the system on "Real
Time
with IPC" on the PCB007 web site.
Sheldahl has been producing print and etch circuits in roll to roll fashion
for many years and TAB circuits have been produced in such fashion for
roughly
40 years. There are lot of interesting variations on the theme. Roll
cutters
were used in the 1960s as well to cut/punch the circuit patterned out and
bond them to films and flex circuit pioneer and co-inventor of the
rigid-flex
circuit (back in 1966, by the way),Tom Stearns, showed a process for
embossing and fly cutting circuits.
Sheldahl and Phillips worked on a roll to roll assembly system with a
reflow
oven that was on rails but I am not certain how many installations there
were.
One of the things that captured my interest 19 years ago was the potential
of printing technology to allow for an economical run unit of one in the
middle of a production run and the potential for a manufacturing operation
that
was prioritized and "run" by the customers. The fact that one can drop in a
unit of one in the middle of a production run without interruption is very
powerful from a economic and time to market point of view. I sense that it
will
happen one day but there is a lot of software and business logistics to
work on
in advance of that.
Today there are intrinsically conductive and semiconductive polymers in the
market and on the way that could change the face of circuit manufacturing
technology in the future. There are interesting times ahead.
Hope this helps a little.
Best wishes,
Joe
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