*Really* small scale: [gadgets.boingboing.net] [attachment 612 logo.jpg] https://reprap.org/forum/read.php?1,10784,10784#msg-10784 Thu, 12 Mar 2026 13:29:22 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,10784,11277#msg-11277 https://reprap.org/forum/read.php?1,10784,11277#msg-11277 Gene Hacker General Sun, 20 Apr 2008 21:49:41 -0400 https://reprap.org/forum/read.php?1,10784,11186#msg-11186 https://reprap.org/forum/read.php?1,10784,11186#msg-11186 damonb General Thu, 17 Apr 2008 23:55:01 -0400 https://reprap.org/forum/read.php?1,10784,11185#msg-11185 https://reprap.org/forum/read.php?1,10784,11185#msg-11185
[www.microscopy.ethz.ch]]]> Gene Hacker General Thu, 17 Apr 2008 22:19:23 -0400 https://reprap.org/forum/read.php?1,10784,11142#msg-11142 https://reprap.org/forum/read.php?1,10784,11142#msg-11142
... the possible positioning- and focussing-accuracy is as good as the single colour-pixels in your mask - e.g. 0,3 to 0,1 mm with the normal highspeed-scanning.

When you remember the tubes in old-style oszilloscopes, then you can see, what's possible with moving the focus only.

With a bit optimizing and highres controllers it shouldn't be a problem to achieve accuracies of 5 to 10 microns with a focus of 30 to 50 microns or even smaller in diameter ...

Viktor]]> VDX General Wed, 16 Apr 2008 05:14:58 -0400 https://reprap.org/forum/read.php?1,10784,11140#msg-11140 https://reprap.org/forum/read.php?1,10784,11140#msg-11140 r2kordmaa General Wed, 16 Apr 2008 02:27:56 -0400 https://reprap.org/forum/read.php?1,10784,10827#msg-10827 https://reprap.org/forum/read.php?1,10784,10827#msg-10827
Here you already have the electron-beam-focussing and -directing, so you only have to rearrange the controlling, cut away the front-screen and rearrange an air-tight housing with a sealing and a vacuum-pump ...

Viktor]]> VDX General Sun, 06 Apr 2008 02:27:33 -0400 https://reprap.org/forum/read.php?1,10784,10825#msg-10825 https://reprap.org/forum/read.php?1,10784,10825#msg-10825 www.engineershandbook.com]

If you can do electron beam melting, it might be possible to have a lot less moving parts. It might even be possible to highly focus the electron beam to etch chips.
[en.wikipedia.org]
In fact, electron microscope can easily be converted into electron beam lithography machines with a simple attachment. Simple STMs can be built quite cheaply, and might offer the possibility of microchip etching, if extensively modified. [www.geocities.com]

Of course, etching is only one part of making microchips. You have to get high purity silicon with just the right crystal structure. Here's a short primer of all the steps they have to go through: [www.intel.com]]]> Gene Hacker General Sun, 06 Apr 2008 02:02:39 -0400 https://reprap.org/forum/read.php?1,10784,10824#msg-10824 https://reprap.org/forum/read.php?1,10784,10824#msg-10824 Roach_S General Sun, 06 Apr 2008 00:28:43 -0400 https://reprap.org/forum/read.php?1,10784,10823#msg-10823 https://reprap.org/forum/read.php?1,10784,10823#msg-10823 Gene Hacker General Sun, 06 Apr 2008 00:18:02 -0400 https://reprap.org/forum/read.php?1,10784,10822#msg-10822 https://reprap.org/forum/read.php?1,10784,10822#msg-10822 Gene Hacker General Sat, 05 Apr 2008 22:13:51 -0400 https://reprap.org/forum/read.php?1,10784,10821#msg-10821 https://reprap.org/forum/read.php?1,10784,10821#msg-10821 Roach_S General Sat, 05 Apr 2008 22:12:57 -0400 https://reprap.org/forum/read.php?1,10784,10818#msg-10818 https://reprap.org/forum/read.php?1,10784,10818#msg-10818 blog.reprap.org]]]> degroof General Sat, 05 Apr 2008 18:09:00 -0400 https://reprap.org/forum/read.php?1,10784,10810#msg-10810 https://reprap.org/forum/read.php?1,10784,10810#msg-10810
Not to mention the possibility of using it to etch chips, like the semiconductor industry already does(except they use masks instead of a controlled ion beam).

Only problem is that it's an ion beam, which means you have to do it in a vacuum.]]> Gene Hacker General Sat, 05 Apr 2008 16:17:16 -0400 https://reprap.org/forum/read.php?1,10784,10788#msg-10788 https://reprap.org/forum/read.php?1,10784,10788#msg-10788
When you have a kid, you can etch a near invisible barcode into their tooth or something and then you'll always know that they are yours.

Or the ultimate tattoos for teens. They tatto their hair, and if they don't like it, it just grows out.]]> redskinsjbs General Fri, 04 Apr 2008 19:14:58 -0400 https://reprap.org/forum/read.php?1,10784,10784#msg-10784 https://reprap.org/forum/read.php?1,10784,10784#msg-10784 gadgets.boingboing.net]

[attachment 612 logo.jpg]]]> degroof General Fri, 04 Apr 2008 18:49:59 -0400